Progress 10/01/12 to 09/30/17
Outputs
Target Audience:Target audience was scientific peers, horticulture industry personnel, and students. Science-based knowledge was delivered through a scientific oral and poster presentations at the American Society for Horticultural Science Conferences. Knowledge was also delivered to undergraduate and graduate students through classroom instruction and laboratory instruction in my three tropical plant and soil sciences (TPSS) courses--TPSS 601 Crop Modeling, TPSS 300 Tropical Production Systems, and TPSS 674 Plant Growth and Development (team taught). Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?Professional development activities included presenting scientific oral and poster presentations at American Society for Horticultural Science Conferences. Attending the conference and presenting the poster promoted networking and interaction with other scientific peers at the conference. I participated in the business meetings of various working groups including Growth Chambers and Controlled Environments Working Group, Vegetable Crop Management Working Group, and the Computer Applications in Horticulture Working Group. I was able to visit the vendor display booths at the conference to become familiar with their different types of artificial lighting products and scientific instruments including NASA Space Life Sciences, Spectrum Technologies, CID-Bio-Science, Apogee Instruments, LI-COR Biosciences, and Decagon Devices. Mentored two University of Hawaii at Manoa College of Engineering undergraduates on their project on light-emitting diodes (LEDs) and vegetables. As a committee member of a University of Hawaii at Manoa College TPSS Department graduate student, I mentored him on his research on LEDs and hydroponic vegetables. Mentored a University of Hawaii at Manoa TPSS Department undergraduate student on his aquaponics project on LEDs, fishes, and vegetables. Mentored the Hawaii Girl Scouts International Space Station Team on their hydroponic project with LEDs and vegetables. How have the results been disseminated to communities of interest?Results have been disseminated through a journal article, scientific oral and poster presentations and conference abstracts at the American Society for Horticultural Science Conferences. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
The objective of this study was to compare the effects of different light sources on the growth of compact 'Winter Density' Bibb lettuce in a noncirculating hydroponic system. At the end of the study, lettuce under LED lighting used significantly less hydroponic nutrient solution than those that under fluorescent lighting. Water productivity (biomass produced per unit of water used) was higher with LEDs. Electrical conductivity (EC) of the nutrient solution was lower in the LED treatment. However, there was no significant difference in the pH of the nutrient solution. Plant height, shoot dry weight, root dry weight, shoot:root ratio, total plant dry weight, partitioning of dry weight to the shoots, partitioning of dry weight to the roots, and SPAD readings did not significantly differ between light treatments. In conclusion, moving lettuce plants from initial LED lighting to later fluorescent lighting may enhance certain attributes of hydroponically grown compact lettuce. The objective of this study was to determine the effects of different light sources on the growth of compact 'Winter Density' Bibb lettuce in a noncirculating hydroponic system. At the end of the study, plant height, shoot-root ratio, % dry weight partitioned to shoots, nutrient solution used, and electrical conductivity of the remaining nutrient solution were greater under fluorescent lighting. Root dry weight, % dry weight partitioned to roots, and shoot dry weight per nutrient solution used were greater under LED lighting. There were no significant differences in shoot dry weight, total plant dry weight, SPAD readings, and pH of the remaining nutrient solution. In conclusion, moving lettuce plants from initial fluorescent lighting to later LED lighting may enhance certain attributes of hydroponically grown compact lettuce. The objective of this study was to determine the effects of different light sources on the growth of miniature "Tom Thumb" butterhead lettuce in a non-circulating hydroponic system. At the end of the study, fluorescent lights resulted in greater root dry weight than blue LEDs and red LEDs. Total plant dry weight under fluorescent lights was greater than under red LEDs. There were no significant differences in shoot dry weight and plant height among the treatments. Percent partitioning of dry weight to shoots was greatest with red LEDs, followed by blue LEDS, and fluorescent lights. Percent partitioning of dry weight to roots was greatest with fluorescent lights, followed by blue LEDS, and red LEDs. Leaf chlorophyll content was greater under blue LEDs and fluorescent lights than red LEDs. The pH of the nutrient solution of the blue LED and the fluorescent light treatments were greater than the red LED treatment. Electrical conductivity of the nutrient solution of the fluorescent light treatment was greater than the blue LED treatment and the red LED treatment. In conclusion, LEDs could provide an alternative lighting source for miniature 'Tom Thumb' lettuce production. The objective of this study was to determine the effects of different light sources on the growth of miniature 'Little Gem' romaine lettuce in a noncirculating hydroponic system. At the end of the study, the fluorescent lights resulted in significantly greater plant height than the LED and LEP treatments. There was no significant difference in plant height between the LED and LEP treatments. Percent partitioning of dry weight to roots was greater with the LEP treatment than the fluorescent lights treatment. There was no significant difference in percent partitioning of dry weight to roots between the LEP and the LED treatments and between the LED and the fluorescent lights treatments. There were no significant differences in shoot dry weight, root dry weight, total dry weight, and percent partitioning of dry weight to shoots among the treatments. In conclusion, LEDs and LEP may provide alternative lighting sources for miniature 'Little Gem' lettuce. The objective of this study was to determine the effects of different light sources on the growth of miniature 'Pom Pom' loose-leaf lettuce in a noncirculating hydroponic system. At the end of the study, plants were taller under the LEP and HO treatments than the LED treatment. The HO treatment resulted in greater partitioning of dry weight to the shoots than the LED and LEP treatments. Under the LED and LEP treatments, a greater partitioning of dry weight to the roots and a greater root-shoot ratio occurred compared to the HO treatment. SPAD readings were highest for the LED treatment. The LED treatment also produced the greatest shoot dry matter production per unit amount of nutrient solution used than the other two treatments. The LED treatment used the least amount of nutrient solution for lettuce production. The electrical conductivity of the remaining nutrient solution of the HO treatment was the highest, followed by the LEP treatment and the LED treatment. There were no significant differences in shoot dry weight, root dry weight, total plant dry weight, and the pH of the remaining nutrient solution in the containers. In conclusion, LED and LEP lights may provide alternative lighting sources to fluorescent lights for miniature lettuce. The objective of this study was to compare the effects of LED and fluorescent light and the sequence of the lighting on the growth of compact 'Tom Thumb' lettuce in a noncirculating hydroponic system. At the end of the study, differences among treatments were significant for plant height, leaf chlorophyll content, root dry weight, total plant dry weight, shoot dry weight produced per amount of nutrient solution used, and the pH and electrical conductivity of the nutrient solution. There were no significant differences among treatments for shoot dry weight, shoot-root ratio, percent dry weight partitioned to the shoots, percent dry weight partitioned to the roots, and the amount of nutrient solution that was used by each lettuce plant. In conclusion, the sequence of LED and fluorescent lighting could be an alternative to only LED or fluorescent lighting for lettuce plants.
Publications
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2017
Citation:
Kobayashi, K.D.* and T.D. Amore. 2017. LED and Fluorescent Lighting Effects on Hydroponically Grown 'Tom Thumb' Lettuce. HortScience 52:Supplement: (in press).
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2017
Citation:
Kobayashi, K.D. 2017. An indoor non-circulating micro-hydroponic system. HortScience 52:Supplement: (in press).
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2016
Citation:
Borsuk, A.* and K.D. Kobayashi. 2016. Spatial optimization of artificial lighting for space grown Amaranthus. Hawaii Space Grant Consortium Spring 2016 Fellowship & Traineeship Symposium. April 23, 2016. Honolulu, HI.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Kobayashi, K.D. 2013. Bend me, shape me Light enhancing crop growth, p. 33-34. In: T. Rhodus (ed.), Changing the Pace - Adopting a Pecha Kucha Approach to Presentations [iBooks 3.0 or later]. Retrieved 1/28/2013 from
https://itunes.apple.com/us/book/changing-pace-adopting-pecha/id594201341?ls=1
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2017
Citation:
Kobayashi, K.D. 2017. NanoRacks-Girl Scouts of Hawaii-Arugula Plant Growth Project on the International Space Station (ISS). HortScience 52:Supplement: (in press).
|
Progress 10/01/15 to 09/30/16
Outputs
Target Audience: Target audience was scientific peers, horticulture industry personnel, and graduate and undergraduate students. Science-based knowledge was delivered to scientific peers, horticulture industry personnel, and graduate and undergraduate students through scientific poster presentations and a workshop presentation at the 2016 American Society for Horticultural Science Conference August 8-11, 2016 in Atlanta, GA. Knowledge was also delivered to undergraduate and graduate students through classroom instruction and laboratory instruction in my Tropical Plant and Soil Sciences (TPSS) courses--TPSS 300 Tropical Production Systems and TPSS 601 Crop Modeling. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Professional development activities included presenting a scientific poster at the 2016 American Society for Horticultural Science Conference August 8-11, 2016 in Atlanta, GA. Attending the conference and presenting the poster promoted networking and interaction with other scientific peers at the conference. I participated in the business meetings of various working groups including Growth Chambers and Controlled Environments Working Group, Vegetable Crop Management Working Group, and the Computer Applications in Horticulture Working Group. I was able to visit the vendor display booths at the conference to become familiar with their different types of artificial lighting products and scientific instruments including NASA Space Life Sciences, Spectrum Technologies, CID-Bio-Science, Apogee Instruments, LI-COR Biosciences, and Decagon Devices. How have the results been disseminated to communities of interest? Results have been disseminated through scientific poster presentations, workshop presentation, and published conference abstracts at the 2016 American Society for Horticultural Science Conference, August 8-11, 2016, in Atlanta, GA. There are also online pdf versions of the scientific posters. What do you plan to do during the next reporting period to accomplish the goals? I plan to continue my research and experimentation. I will present my research results at the 2017 American Society for Horticultural Science Conference September 19-22, 2017 in Waikoloa, HI. Develop a mobile website to summarize the research results and conference presentations. Set up several programmable LED light fixtures that allow varying the ratio of blue to red LED lighting.
Impacts
What was accomplished under these goals?
Food safety, environmental impacts, and efficient energy usage are growing concerns in horticultural production systems. Producing lettuce under artificial lighting can be a solution addressing these concerns. Light-emitting diodes (LED) offer the advantages of a narrow light spectrum, low power consumption, and little heat production. The objective of this study was to compare the effects of different light sources on the growth of compact 'Winter Density' Bibb lettuce in a noncirculating hydroponic system. 'Winter Density' Bibb lettuce seeds were started in Oasis cubes under T5 high output fluorescent lighting in a lab. Seedlings were transferred to 5.1-cm net pots, which were placed in 1.9-liter containers containing a hydroponic nutrient solution. The solution was composed of Hydro-Gardens' Hobby Formula 10-8-22 hydroponic fertilizer with added magnesium sulfate (9.8% Mg). The lettuce seedlings were grown under red+blue+white LEDs with a light level of 121 µmol/m2/s and a photoperiod of 16 h. After 10 days, half of the plants in the containers were moved under T5 high output fluorescent lighting for 10 more days. The light level was 118 µmol/m2/s and the photoperiod 16 h. At the end of the study, lettuce under LED lighting used significantly less hydroponic nutrient solution than those that under fluorescent lighting. Water productivity (biomass produced per unit of water used) was higher with LEDs. Electrical conductivity (EC) of the nutrient solution was lower in the LED treatment. However, there was no significant difference in the pH of the nutrient solution. Plant height, shoot dry weight, root dry weight, shoot:root ratio, total plant dry weight, partitioning of dry weight to the shoots, partitioning of dry weight to the roots, and SPAD readings did not significantly differ between light treatments. In conclusion, moving lettuce plants from initial LED lighting to later fluorescent lighting may enhance certain attributes of hydroponically grown compact lettuce.
Publications
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2016
Citation:
Kobayashi, K.D. and Amore, T.D. 2016. Fluorescent and LED lighting effects on hydroponically grown 'Winter Density' Bibb lettuce. 2016 American Society for Horticultural Science Annual Conference. August 8-11, 2016. Atlanta, GA. HortScience Supplement (in press).
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2016
Citation:
Kobayashi, K.D. 2016. Light quality enhancement of growth and flowering of orchids. 2016 American Society for Horticultural Science Annual Conference. August 8-11, 2016. Atlanta, GA. HortScience Supplement (in press).
- Type:
Conference Papers and Presentations
Status:
Awaiting Publication
Year Published:
2016
Citation:
Borsuk, A. and Kobayashi, K.D. 2016. Effects of LED lighting spatial configuration on spaceflight analog amaranth crops. 2016 American Society for Horticultural Science Annual Conference. August 8-11, 2016. Atlanta, GA. HortScience Supplement (in press).
|
Progress 10/01/14 to 09/30/15
Outputs
Target Audience:Target audience was scientific peers, horticulture industry personnel, and graduate and undergraduate students. Science-based knowledge was delivered to scientific peers, horticulture industry personnel, and graduate and undergraduate students through a scientific poster presentation at the American Society for Horticultural Science Conference August 4-7, 2015 in New Orleans, LA. Knowledge was also delivered to undergraduate and graduate students through classroom instruction and laboratory instruction in my tropical plant and soil sciences (TPSS) courses---TPSS 300 Tropical Production Systems and TPSS 601 Crop Modeling. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?Professional development activities included presenting a scientific poster at the American Society for Horticultural Science Conference August 4-7, 2015 in New Orleans, LA. Attending the conference and presenting the poster promoted networking and interaction with other scientific peers at the conference. I participated in the business meetings of various working groups including Vegetable Crop Management Working Group and the Computer Applications in Horticulture Working Group. I was able to visit the vendor display booths at the conference to become familiar with their different types of artificial lighting products and scientific instruments including NASA Space Life Sciences, Spectrum Technologies, CID-Bio-Science, Apogee Instruments, LI-COR Biosciences, and Decagon Devices. How have the results been disseminated to communities of interest?Results have been disseminated through a scientific poster presentation and a published conference abstract at the American Society for Horticultural Science Conference August 4-7, 2015 in New Orleans, LA. There is also an online pdf version of the scientific poster. What do you plan to do during the next reporting period to accomplish the goals?I plan to continue my research and experimentation. I will present research results at the American Society for Horticultural Science Conference August 8-11, 2016 in Atlanta, GA. Develop a mobile website to summarize the research results and conference presentations. Set up several programmable LED light fixtures that allow varying the ratio of blue to red LED lighting.
Impacts
What was accomplished under these goals?
There is growing concern about food safety, environmental impact, and efficient energy usage in horticultural production systems. Producing lettuce under artificial lighting can be a solution addressing these concerns. Light-emitting diodes (LED) offer the advantages of a narrow light spectrum, low power consumption, and little heat production. The objective of this study was to determine the effects of different light sources on the growth of compact 'Winter Density' Bibb lettuce in a noncirculating hydroponic system. 'Winter Density' Bibb lettuce seedlings were started in Oasis cubes. Seedlings were transferred to 5.1-cm net pots and put in 1.9-liter containers containing a hydroponic nutrient solution. The solution was composed of Hydro-Gardens' Hobby Formula 10-8-22 hydroponic fertilizer with added magnesium sulfate (9.8% Mg). The lettuce were grown in a lab under high output T-5 fluorescent lights. The light level was 119.5 µmol/m2/s with an air temperature of 22.6°C. The photoperiod was 16 h. After 10 days, half of the plants in the containers were moved under red+blue+white LEDs for 10 more days. At the end of the study, plant height, shoot-root ratio, % dry weight partitioned to shoots, nutrient solution used, and electrical conductivity of the remaining nutrient solution were greater under fluorescent lighting. Root dry weight, % dry weight partitioned to roots, and shoot dry weight per nutrient solution used were greater under LED lighting. There were no significant differences in shoot dry weight, total plant dry weight, SPAD readings, and pH of the remaining nutrient solution. In conclusion, moving lettuce plants from initial fluorescent lighting to later LED lighting may enhance certain attributes of hydroponically grown compact lettuce.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2015
Citation:
Kobayashi, K.D. and Amore, T.D. 2015. Light source effects on hydroponically grown compact 'Winter Density' Bibb lettuce. 2015 American Society for Horticultural Science Annual Conference. August 4-7, 2015. New Orleans, LA. HortScience 50(9)Supplement:S320-S321.
|
Progress 10/01/13 to 09/30/14
Outputs
Target Audience: Target audience was scientific peers, horticulture industry personnel, and students. Science-based knowledge was delivered through a scientific poster presentation at the American Society for Horticultural Science Conference July 28-31, 2014 in Orlando, Florida. Knowledge was also delivered to undergraduate and graduate studentsthrough classroom instruction and laboratory instruction in my three tropical plant and soil sciences (TPSS) courses--TPSS 601 Crop Modeling, TPSS 674 Plant Growth and Development, and TPSS 300 Tropical Production Systems. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Professional development activities included presenting a scientific poster at the American Society for Horticultural Science Conference July 28-31, 2014 in Orlando, FL. Attending the conference and presenting the poster promoted networking and interaction with other scientific peers at the conference. I was able to visit the vendor display booths at the conference to become familiar with their different types of artificial lighting products. I mentored the Hawaii Girl Scouts International Space Station Team on their hydroponic project with LEDs and vegetables. How have the results been disseminated to communities of interest? Results have been disseminated through a scientific poster presentation and a published conference abstract at the American Society for Horticultural Science Conference July 28-31, 2014 in Orlando, FL. What do you plan to do during the next reporting period to accomplish the goals? I plan to continue my research and experimentation. I will present research results at the American Society for Horticultural Science Conference August 4-7, 2015 in New Orleans, LA. Develop a website to summarize the research results and conference presentations. Plan to purchase programmable LED light fixtures with the CTAHR Supplemental Funding I received.
Impacts
What was accomplished under these goals?
There is growing concern about food safety, environmental impact, and efficient energy usage in horticultural production systems. Producing lettuce under artificial lighting can be a solution addressing these concerns. Light-emitting diodes (LED) offer the advantages of a narrow light spectrum, low power consumption, and little heat production. Light emitting plasma (LEP) provides high light intensity, sun-like full spectrum, and long life. The objective of this study was to determine the effects of different light sources on the growth of miniature 'Pom Pom' loose-leaf lettuce in a noncirculating hydroponic system. Lettuce seedlings were started in Oasis cubes, which were transferred to 5.1-cm net pots and put in 1.9-liter containers containing a hydroponic nutrient solution. The solution was composed of Hydro-Gardens' Hobby Formula 10-8-22 hydroponic fertilizer with added magnesium sulfate (9.8% Mg). The lettuce was grown in a lab under different light treatments--red+blue+white LEDs, light emitting plasma, and high output T-5 fluorescent lights (HO). The light level was 261 umoles/m/s with an air temperature 21°C. At the end of the study, plants were taller under the LEP and HO treatments than the LED treatment. The HO treatment resulted in greater partitioning of dry weight to the shoots than the LED and LEP treatments. Under the LED and LEP treatments, a greater partitioning of dry weight to the roots and a greater root-shoot ratio occurred compared to the HO treatment. SPAD readings were highest for the LED treatment. The LED treatment also produced the greatest shoot dry matter production per unit amount of nutrient solution used than the other two treatments. The LED treatment used the least amount of nutrient solution for lettuce production. The electrical conductivity of the remaining nutrient solution of the HO treatment was the highest, followed by the LEP treatment and the LED treatment. There were no significant differences in shoot dry weight, root dry weight, total plant dry weight, and the pH of the remaining nutrient solution in the containers. In conclusion, LED and LEP lights may provide alternative lighting sources to fluorescent lights for miniature lettuce.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2014
Citation:
Kobayashi, K.D. and Amore, T.D. 2014. Light source effects on hydroponically grown miniature Pom Pom lettuce. HortScience 49(9) Supplement:S384.
|
Progress 10/01/12 to 09/30/13
Outputs
Target Audience: Target audience was scientific peers. Efforts included delivering science-based knowledge through a scientific poster presentation at the American Society for Horticultural Science Conference. Delivered science-based knowledge through formal classroom instruction and laboratory instruction in three horticulture courses--TPSS 601, 674, and 300. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Professional development activities included presenting a scientific poster at the American Society for Horticultural Science Conference. Networked and interacted with scientific peers at the conference and became aware of similar research. Became familiar with different types of artificial lighting through visiting display booths at the conference. Mentored two University of Hawaii at Manoa College of Engineering undergraduates on their project on light-emitting diodes (LEDs) and vegetables. As a committee member of a University of Hawaii at Manoa College TPSS Department graduate student, I mentored him on his research on LEDs and hydroponic vegetables. Mentored a University of Hawaii at Manoa TPSS Department undergraduate student on his aquaponics project on LEDs, fishes, and vegetables. Mentored the Hawaii Girl Scouts International Space Station Team on their hydroponic project with LEDs and vegetables. How have the results been disseminated to communities of interest? Results have been disseminated through a scientific poster presentation and a conference abstract at the American Society for Horticultural Science Conference. What do you plan to do during the next reporting period to accomplish the goals? Continue research and experiments. Present research results at the American Society for Horticultural Conference in July, 2014 in Orlando, FL. Develop mobile web sites (capable of being viewed on smartphones and e-tablets) which will summarize research results and conference presentations. Purchase a portable handheld spectroradiometer with the CTAHR FY 2014 Supplemental Funding I received.
Impacts
What was accomplished under these goals?
There is growing concern about food safety, environmental impact, and efficient energy usage in agricultural production systems. Producing lettuce under artificial lighting could be a solution addressing these concerns. Light-emitting diodes (LEDs) offer the advantages of a narrow light spectrum, low power consumption, and little heat production. The objective of this study was to determine the effects of different light sources on the growth of miniature “Tom Thumb” butterhead lettuce in a non-circulating hydroponic system. The lettuce was grown in a lab under three light treatments—blue LEDs, red LEDs, and fluorescent lights. At the end of the study, fluorescent lights resulted in greater root dry weight than blue LEDs and red LEDs. Total plant dry weight under fluorescent lights was greater than under red LEDs. There were no significant differences in shoot dry weight and plant height among the treatments. Percent partitioning of dry weight to shoots was greatest with red LEDs, followed by blue LEDS, and fluorescent lights. Percent partitioning of dry weight to roots was greatest with fluorescent lights, followed by blue LEDS, and red LEDs. Leaf chlorophyll content was greater under blue LEDs and fluorescent lights than red LEDs. The pH of the nutrient solution of the blue LED and the fluorescent light treatments were greater than the red LED treatment. Electrical conductivity of the nutrient solution of the fluorescent light treatment was greater than the blue LED treatment and the red LED treatment. In conclusion, LEDs could provide an alternative lighting source for miniature 'Tom Thumb' lettuce production. Light emitting plasma (LEP) offer high light intensity, sun-like full spectrum. The objective of this study was to determine the effects of different light sources on the growth of miniature ‘Little Gem’ romaine lettuce in a noncirculating hydroponic system. At the end of the study, the fluorescent lights resulted in significantly greater plant height than the LED and LEP treatments. There was no significant difference in plant height between the LED and LEP treatments. Percent partitioning of dry weight to roots was greater with the LEP treatment than the fluorescent lights treatment. There was no significant difference in percent partitioning of dry weight to roots between the LEP and the LED treatments and between the LED and the fluorescent lights treatments. There were no significant differences in shoot dry weight, root dry weight, total dry weight, and percent partitioning of dry weight to shoots among the treatments. In conclusion, LEDs and LEP may provide alternative lighting sources for miniature 'Little Gem' lettuce.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Kobayashi, K., Lazaro, M., and Amore, T. 2013. Light-emitting diodes (LEDs) for miniature hydroponic lettuce. Optics and Photonics Journal 3(1):74-77.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Kobayashi, K.D. 2013. Bend me, shape me Light enhancing crop growth, p. 33-34. In: T. Rhodus (ed.), Changing the Pace - Adopting a Pecha Kucha Approach to Presentations [iBooks 3.0 or later]. Retrieved 1/28/2013 from https://itunes.apple.com/us/book/changing-pace-adopting-pecha/id594201341?ls=1
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Loo, K.L., Witteman, G., and Kobayashi, K. 2013. Development of a model aquaponics system equipped with environmental sensors that have reactive capabilities. 25th Annual CTAHR and COE Student Research Symposium Program Schedule, p. 27.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Kobayashi, K.D. and Amore, T.D. 2013. Light source effects on hydroponically-grown miniature 'Little Gem' lettuce. HortScience 48(9) Supplement:S272.
|
Progress 10/01/11 to 09/30/12
Outputs
OUTPUTS: Conducted and analyzed experiments. Taught about and demonstrated different artificial lighting systems to students. Wrote conference abstracts, designed a conference poster and slides for a conference oral presentation. Networked with other scientists doing research on light-emitting diodes and plants. Results have been disseminated to communities of interest through presentations at a scientific conference and through conference abstracts. New knowledge was presented at a national scientific conference and included in conference abstracts. PARTICIPANTS: Student lab assistant worked on the project. TARGET AUDIENCES: Commercial hydroponic vegetable growers and scientists working on artificial lighting systems used in vegetable production. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Light-emitting diodes offer an alternative artificial lighting source for growing hydroponic vegetables under controlled conditions. Red LEDs and blue LEDs could be used as an alternative to fluorescent lights.
Publications
- Kobayashi, K.D. 2012. Bend me, shape me - Light enhancing crop growth. HortScience 47(9)(Supplement):S106.
- Kobayashi, K.D.* and Lazaro, M.K. 2012. Light-emitting diodes for miniature hydroponic lettuce. HortScience 47(9)(Supplement):S411.
|
Progress 10/01/10 to 09/30/11
Outputs
OUTPUTS: Conducted and analyzed experiments. Organized photoselective shadecloth experiments in the course TPSS 364 Horticultural Practices and hydroponics experiments in TPSS 300 Tropical Production Systems. Produced a poster "Use of Light-Emitting Diodes in Anthurium Micropropagation". Presented a paper "Use of Light-Emitting Diodes in Anthurium Micropropagation" at the American Society for Horticultural Conference in Waikoloa, Hawaii September 25-28, 2011. Also, displayed this poster "Use of Light-Emitting Diodes in Anthurium Micropropagation" at the Hawaii MIDPAC Horticultural Conference in Hilo, Hawaii July 21, 2011. Created the Micro-hydroponics website ( http://4b7r.zapd.co/ ). PARTICIPANTS: Student help assisted on this project. TARGET AUDIENCES: Target audiences are anthurium, orchid, and vegetable growers. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
With comparable growth and flowering of potted orchids, coir (coconut) fiber was an adequate substitute in a volcanic cinder growing media for peat moss, a non-renewable resource. Photoselective (colored) shadecloths altered the growth and development of potted orchids and lettuce, indicating their potential for manipulating the light spectrum for these crops. Lettuce grown hydroponically under light-emitting diodes and fluorescent lights showed different growth patterns. Under fluorescent lights, higher light intensity produced more and faster growth. Blue LEDs showed comparable growth, with lettuce growing more upright. Red LEDs resulted in a more prostrate lettuce. In indoor lettuce production under artificial lighting, blue LEDs are adequate, thus reducing energy consumption, heat production, and costs (LEDs last longer than fluorescents). With tissue culture plants, LEDs offer a possible means of manipulating the growth of anthurium explants. LEDs could supplement growth regulators used in tissue culture media with the added benefits of reduced energy consumption, heat production, and costs. Ohelo (Vaccinium reticulatum) can be propagated from seed in a laboratory under high output fluorescent lighting as an alternative to propagation in the greenhouse. Indoor growing conditions allow better control of a more pest-free environment. Ohelo showed salinity problems (leaf edges turned brown) when fertilized with a hydroponic solution indicating careful fertilization is needed for seedlings. Young ohelo seedlings when topped (remove terminal bud) readily produced side shoots. Older seedlings when topped did not readily produce side shoots. The time of topping was critical in ensuring a bushy potted ohelo plant that can be transplanted into the field.
Publications
- Kobayashi, K.D. and Amore, T.D.. 2011. Use of Light-Emitting Diodes in Anthurium Micropropagation. HortScience 46(9) (Supplement):S395-S396. American Society for Horticultural Science Annual Conference, Waikoloa, Hawaii. September 25-28, 2011.
- Radovich, T.J.K., Hue, N.V., Pant, A., Sugano, J., Gurr, I., Sipes, B., Arancon, N., Tamura, C., Fox, K., Kobayashi, K.D., and Paull, R.. 2011. Innovative Use of Locally Produced Inputs to Improve Plant Growth, Crop Quality, and Grower Profitability in Hawaii. HortScience 46(9) (Supplement):S79-S80. American Society for Horticultural Science Annual Conference, Waikoloa, Hawaii. September 25-28, 2011.
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Progress 10/01/09 to 09/30/10
Outputs
OUTPUTS: Results were disseminated at a national conference and in a national conference abstract. Results were shared with students in departmental courses. Participants: PI, department collaborators, and student help worked on the project. Target audiences: Researchers, extension personnel, growers, and industry organizations. Project modifications: No major changes. PARTICIPANTS: PI, department collaborators, and student help worked on the project. TARGET AUDIENCES: Researchers, extension personnel, growers, and industry organizations. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
PI learned about the effect of light spectrum on crop growth and development and the effect of different potting media and fertilizer rates on crop growth and flowering. Photoselective shadecloths manipulated crop growth and development and could be used as an alternative to growth regulator chemicals, benefitting workers' health and reducing environmental contamination. Coir (coconut) fiber resulted in comparable growth and could substitute for peat moss in potting media, thereby conserving this limited resource. Lower fertilizer rates resulted in comparable growth and could reduce excessive leaching and environmental contamination.
Publications
- Kobayashi, K.D. and Amore, T.D. 2010. Use of light-emitting diodes in anthurium and orchid micropropagation. HortScience 45(8) (Supplement):S194.
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Progress 10/01/08 to 09/30/09
Outputs
OUTPUTS: PI planned, conducted, and analyzed experiments and results. Student help assisted. Products: techniques of using light spectrum to manipulate plant growth and development. Results were disseminated through a national conference proceedings paper, two paper presentations and abstracts at a national conference, and a national newsletter. PARTICIPANTS: PI, department faculty collaborator, and student help worked on the project. TARGET AUDIENCES: Scientific peers, extension personnel, and growers. PROJECT MODIFICATIONS: Nothing significant to report.
Impacts
PI learned about the effect of light spectrum on plant growth and development and the effect of different potting media and fertilizer rates on plant growth and flowering. New knowledge was presented at a national conference, in national conference abstracts, a national conference proceedings paper, and a national newsletter.
Publications
- Kobayashi, K.D. 2009. Effects of photoselective shadecloth and plastic film on the growth of potted poinsettia. Proc. 35th National Agricultural Plastics Congress, State College, PA.
- Kobayashi, K.D. and Griffis, J. 2009. Use of light-emitting diodes in dracaena micropropagation. Program & Abstracts American Society for Horticultural Science Annual Conference, St. Louis, MO, HortScience 44(4):1105. Abstract content reported on in Herman, E.B. 2009. Selection of light-emitting diodes for optical micropropagation. Agricell Report 53(1):4.
- Kobayashi, K.D. 2009. Nutrient management of potted dendrobium and oncidium orchids. Program & Abstracts American Society for Horticultural Science Annual Conference, St. Louis, MO, HortScience 44(4):1187.
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Progress 10/01/07 to 09/30/08
Outputs
OUTPUTS: Conducted and analyzed experiments. Results were disseminated through an American Society for Plasticulture conference proceedings paper and a paper presentation at an American Society for Horticultural Science conference along with the abstract in the conference program. PARTICIPANTS: PI planned, conducted, and analyzed the experiments and results. Presented findings in a national conference proceedings paper and a paper presentation at a national scientific conference. TARGET AUDIENCES: scientific peers and growers PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
PI learned new applied knowledge that was included in a national conference proceedings paper publication and presented at a national scientific conference.
Publications
- Kobayashi, K.D. and Mersino, E.F. 2008. Photoselective shadecloths alter flowering of potted orchids. Proceedings 34th National Agricultural Plastics Congress, 6 p. March 7-10, 2008. Tampa, FL.
- Kobayashi, K.D. and Mersino, E.F. 2008. Photoselective shadecloths influence flowering of Dendrobium orchids. 2008 American Society for Horticultural Science Annual Conference. July 21-24, 2008. Orlando, FL. HortScience 43(4):1262. (Abstract)
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