Progress 10/01/11 to 04/29/15
Outputs
Target Audience: The intended audience includes scientists interested in plant and soil interactions and farmers interested in irrigation and fertilizer effects on rice production. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Two PhD students completed degree requirements working on aspects of this project. How have the results been disseminated to communities of interest? Presentations were made at the Rice Technical Working Group meetings. Farmer level presentations were made at the Annual National Cotton & Rice meeting. A training presentation was made to the state NRCS engineers. 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 objectives of this study are to: 1) Establish baseline data on water use and GHG emissions from rice grown using current management practices, 2) Evaluate potential crop management changes that are expected to reduce water use and mitigate GHG emissions in rice production, 3) In collaboration with other disciplines and organizations evaluate the impact of promising management approaches on disease incidence and potential economic viability, 4) Provide farmer level recommendations on viable management improvements and incorporate results into existing models.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2012
Citation:
Beck, P.A., M. Anders, B. Watkins, S. Gunter, D. Hubbell, and S. Gadberry. 2012. Improving the production, environmental, and economic efficiency of the stocker cattle industry in the Southeastern United States. Journal of Animal Science. 10:5527.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Hristovska, T., K.B. Watkins, and M.M. Anders. 2013 .An economic risk analysis of no-till management for the rice-soybean system used in Arkansas. Journal of Soil and Water Conservation.
- Type:
Journal Articles
Status:
Submitted
Year Published:
2013
Citation:
Motschenbacher, J.M., K.R. Brye, M.M. Anders, E.E. Gbur, N.A. Slaton, and M.A. Evans-White. 2013. Long-term rice rotation, tillage, and fertility effects on chemical properties in a silt-loam soil. Submitted SSSAJ.
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Adviento-Borbe, M.A., C. Pittelkow, M. Anders, B. Linquist, C. van Kessel, A.M. McClung, J. Hill, J. Six. 2014. Efficient fertilizer N rates reduced greenhouse gas emissions and global warming potentials in California and Arkansas drill Seeded rice ecosystems. Submitted to Global Change Biology.
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Gealy, D., M. Anders, S. Duke, K.B. Watkins, and H. Black. 2013. Crop performance and weed suppression by weed-suppressive rice (Oryza sative) cultivars in furrow-and flood-irrigated systems under reduced herbicide inputs. Weed Science
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Progress 01/01/13 to 09/30/13
Outputs
Target Audience: The work carried out in this project will target those involved in establishing crop management protocols that will result in rice producers receiving carbon credits. It will provide frmers with management options in rice production that will conserve natural resources and allow them access to carbon markets. It will provide scientists insight into the plant mechanisms responsibel for greenhouse gas emissions in rice fields. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? During the reporting period there was a PhD student from Brazil working with our team on the greenhouse gas project. Her work with this project will be part of her thesis that will be presented in Brazil. How have the results been disseminated to communities of interest? Presentations were made at the Rice Technical Working Group meeting. Farmer level presentations were made at the 16th Annual National Cotton & Rice meeting. A training presentation was made to the state NRCS engineers. What do you plan to do during the next reporting period to accomplish the goals? A number of presentations across a range of audiences are scheduled for 2014. Three papers are being drafted for publication. One additional field study is being planned to better understand greenhouse gas management in rice production
Impacts
What was accomplished under these goals?
Are accomplishments during this reoporting period included the completion of one study that evaluated the effects of reduced water management on irrigation water use and greenhouse gas emissions from rice fields under continuous rice and rice-soybean rotations. This work follows a similar study last year and work that we have previously published on the effect of N fertilizer rates on greenhouse gas emissions. Our work this season expanded on previous results and confirmed that it is possible to significantly reduce irrigation water use in rice production while not significantly reducing grain yeild. Management practices use to reduce irrigation water use also significantly reduced greenhouse gas emissions. We completed arsenic analysis on grain samples collected from this study in 2011 and 2012. Results indicated that as we reduced water applications we reduced total arsenic content in whole grain rice. Results from this study are being used to develop a protocol that will allow rice farmers to receive carbon credits throught the American Carbon Exchange. We have worked closely with the California Air Resources Board to develop verifyable practices that can be used on the California and international carbon markets.
Publications
- Type:
Journal Articles
Status:
Accepted
Year Published:
2013
Citation:
Gealy, D., M. Anders, S. Duke, K.B. Watkins, and H. Black.
Crop performance and weed suppression by weed-suppressive rice (Oryza sative) cultivars in furrow-and flood-irrigated systems under reduced herbicide inputs.
Weed Science
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Progress 01/01/12 to 12/31/12
Outputs
OUTPUTS: Finding from this project have been disseminated to local farmers through presentations made at the annual Cotton and Rice Conservation Conference. At this conference researchers are paired with farmers who have adopted some of the practices being evaluated in the study and are willing to voice their opinions on their potential. The presentations made at this meeting were related to reducing irrigation water used in rice production. This same study was highlighted at the research station's field day where farmers, crop consultants, and researchers were presented findings from this study at the study location. A number of presentations highlighting results from this project were made at the Rice Outlook Conference which targets rice researchers throughout the United States. Results from our study evaluating management strategies that reduce irrigation water needed for rice production resulted in an invitation from the Brazil Government provide a featured presentation at an international conference on water use in rice. Results from our work on the influence of water management practices on greenhouse gas emissions in rice resulted in an invitation from the USDA-FAS to provide technical input for a project in Vietnam. This work is moving forward with workshops and field-level demonstrations scheduled for 2013. Through this work we have been able to expand our outputs to an international audience. We have completed a number of scientific publications in peer reviewed journals that were made available to researchers throughout the world. PARTICIPANTS: Dr. Bruce Linquist, University of California at Davis is a collaborator who alos provides greenhouse gas analysis. Dr. Dan Olk, USDA-ARS, Soil, Water, and Air Resources Research Unit 2100 University Boulevard, Ames, IA, 50011 is a collaborator and provides labeled nitrogen for these studies. Jill K. Luxenberg, USDA/FAS/OCBD/DRDA, Rural Development Natural Resources is a collaborator and organized workshops for the project in Vietnam. TARGET AUDIENCES: Nothing significant to report during this reporting period. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
The primary outcomes of this project will be to identify potential crop management strategies that will reduce greenhouse gas emissions in rice and quantify those management changes as they relate to grain yield and associated natural resources. Data presented in 2012 indicated that applying nitrogen fertilizer between 100 and 140 kg N ha-1 would result in optimum grain yield and a reduced nitrous oxide emission. These rates are somewhat less than farmers currently use and illustrate the potential impact of reducing greenhouse gas emissions through proper nitrogen fertilizer management. Data collected in 2012 illustrated the potential of identifying varieties that emit less methane under flooded conditions. Among the four varieties tested there was a range in methane emissions from 52874 to 80980 g CH4-C ha-1 season-1. When these data were combined with nitrous oxide emissions and yield scaled the global warming potential of the high and low methane emitting varieties was 186 and 368 kg CO2 eq Mg-1 season-1. These results illustrate the potential to select varieties emit lower levels of methane under flooded conditions and are capable of acceptable grain yields. Our previous work with water was augmented with greenhouse gas measurements in 2012. Utilizing earlier data to guide our nitrogen management we showed that, by reducing the time rice is growing under flood water management, we could reduce irrigation water use by 30% and, at the same time reduce global warming potential from 249 kg CO2 eq Mg-1 season-1 to 23 kg CO2 eq Mg-1 season-1. This was done without a significant reduction in grain yield. These results and those for irrigation water use from the same study show that water use can be reduced using the same management that significantly reduces methane emissions in rice production. These results are now being implemented on selective farms in the research area and through an international project in Vietnam.
Publications
- Anders, M.M., K.R. Brye, D.C. Olk, and B.T. Schmid. 2012. Rice rotation and tillage effects on soil aggregation and aggregate carbon and nitrogen dynamics. SSSAJ Vol.76 No.3 p.994-1004.
- Hristovska, T., K.B. Watkins, and M.M. Anders. 2012. An economic risk analysis of no-till management for the rice-soybean system used in Arkansas. Accepted Journal of Soil and Water Conservation.
- Anders, M.M., K.B. Watkins, L.L. Nalley, T.J. Siebenmorgen, and K.R. Brye. 2012. Growing rice with less water. 2012. In: R.J. Norman and K.A.K. Moldenhouer (eds.). B.R. Wells Rice Research Studies 2011. University of Arkansas Agricultural Experiment Station, Research Series 600, August 2012, 188-194.
- Watkins, K.B., T. Hristovska, and M.M. Anders. 2012. Measuring the stochastic monetary benefits of multiple inlet irrigation in Arkansas rice production. Selected paper presented at the 2012 Southern Agricultural Economics Association Annual Meeting, February 4-7, 2012, Birmingham, Alabama. http://ageconsearch.umn.edu/bitstream/119655/2/Watkins%202012.pdf
- Hristovska, T., K.B. Watkins, and M.M. Anders. 2012. An economic risk analysis of no-till management for the rice-soybean rotation system used in Arkansas. Selected paper presented at the 2012 Southern Agricultural Economics Association Annual Meeting, February 4-7, 2012, Birmingham, Alabama. http://ageconsearch.umn.edu/bitstream/119676/2/HristovskaRev.pdf
- Hristovska, T., K.B. Watkins, and M.M. Anders. 2012. An economic risk analysis of no-till management for the rice-soybean rotation system used in Arkansas. In: R.J. Norman and K.A.K. Moldenhouer (eds.). B.R. Wells Rice Research Studies 2011. University of Arkansas Agricultural Experiment Station, Research Series 600, August 2012, 348-355.
- Motschenbacher, J.M., K.B. Brye, M.M. Anders, and E.E. Gbur. 2012. Soil Surface CO2 flux as affected by rice-based rotation and tillage. In: R.J. Norman and K.A.K. Moldenhouer (eds.). B.R. Wells Rice Research Studies 2011. University of Arkansas Agricultural Experiment Station, Research Series 600, August 2012, 202-207.
- Motschenbacher, J.M., K.R. Brye, M.M. Anders, and E.E. Gbur. 2012. Water-stable soil aggregation in rice-based crop rotations. In: R.J. Norman and K.A.K. Moldenhouer (eds.). B.R. Wells Rice Research Studies 2011. University of Arkansas Agricultural Experiment Station, Research Series 600, August 2012, 208-214.
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