Recipient Organization
UNIV OF WISCONSIN
21 N PARK ST STE 6401
MADISON,WI 53715-1218
Performing Department
DAIRY SCIENCE-GEN
Non Technical Summary
Dairy beef crossbreeding has drastically increased in the dairy industry to help dairy producers better manage animal inventory and increase thevalue of young calves that are fed in beef cattle operations. Feeding management will impact animal growth and feed costs which directly impact profitability for the dairy and beef producers. Feeding also will impact meat quality and eating quality for consumers. However, littleis known about impacts of feeding strategies on dairy beef crossbred cattle growth and the final meat product that consumers purchase.To addressthe lack of information, on-farm extension surveys and research with Wisconsin dairy and beef producers will be conducted along with a controlled feeding study to evaluate how different feeding programs (normal or higher milk feeding; and use of short or long growing period prior to feeding a finishing ration) affect animal growth and meat quality. Based on the research findings and management survey results, extension resources (articles, factsheets, and presentations) will be developed and presented at on-farm workshops, seminars, and webinars to help producers understand current practices and opportunities for improvement. Economic budgeting tools will also be updated to allow producers to make specific budgets for dairy beef crossbreds to help improve profitability. This work will provide applicable information that dairy and beef producers can use to improve current management and feeding programs to increase profitability for livestock producers and support meat processor and consumer demand for meat products from dairy beef crossbred cattle.The overall goal of the proposed integrated research and extension project is to provide both dairy and beef cattle producers with management guidelines, tools, and learning opportunities to improve growth and carcass quality of Holstein beef cross cattle leading to greater profitability for both industries and to improve meat quality for consumers.
Animal Health Component
100%
Research Effort Categories
Basic
0%
Applied
100%
Developmental
0%
Goals / Objectives
The goal of thisintegrated research and extension project is to provide both dairy and beef cattle producers with management guidelines, tools, and learning opportunities to improve growth and carcass quality of Holstein beef cross cattle leading to greater profitability for both industries.To meet this goal, the objectives of the project are:1) Understand dairy and beef feeding management impacts on production of Holstein beef crossbred cattle to support industry recommendations.To address this, we plan to conduct two projects including: 1) a collaborative project with county agricultural agents/educators to gather management, feeding, growth, and carcass data from commercial Wisconsin dairy and beef producers and 2) a controlled study using Holstein beef crossbred calves from the University of Wisconsin-Madison dairy herd to evaluate calf milk feeding and grower/finisher feeding management.2)Develop an extension program to enable rapid adoption of recommended management practices for Holstein beef crossbreds by dairy and beef producers. Based on objective one data, we will developresources and tools fordairy and beef producers to improve feeding management and animal growth. We plan to provideprogramming to local clientele (workshops, field-days, presentations) in addition to easily accessible resources for producers and consultants across the US (factsheets, popular press articles, instructional videos, and a budgeting tool).
Project Methods
Objective 1: Understand dairy and beef feeding management impacts on production of dairy beef crossbred cattle to support industry recommendations Study 1Dairy Operation Survey:In year one, we will enroll 20 to 40 WI dairy operations that primarily manage the Holstein breed and also crossbreed with beef breed semen. At each farm, we will survey the dairy producer on crossbred calf management including sire selection, colostrum and milk feeding, post-calving care, and calf selling strategy and sale price.Beef Operation Survey:In year one and two, we will enroll eight WI beef operations that purchase Holstein beef crossbred calves and feed the calves out until selling as finished cattle. The three collaborators will identify farms that use an electronic scale to allow weighing at specific times. We will seek to survey operations that vary in feeding management (4 farms using a calf-fed and 4 farms using a grower/finisher system). At each farm, we will survey the beef producer on calf management including purchasing strategy, calf health, milk feeding, housing, grower/finisher feeding management, growth implant use, and indicators of finished cattle. In addition, collaborators will work with farms to gather weights of specific groups at arrival, weaning, start of the finishing ration, and prior to harvest. Feeding data will also be collected to estimate feed costs.AnalysisData from dairy producer surveys will be analyzed to determine simple statistics for qualitative and quantitative questions and used to develop extension reports and factsheets. Data from beef producer surveys will be analyzed similarly. The growth data will be analyzed using a mixed model (Proc Mixed; SAS software version 9.4) to evaluate effects of management.Study 2The study will be conducted at the UW-Madison Arlington and Marshfield Agricultural Research Stations. Calves will be housed in individual hutches and fed milk replacer treatments until weaned at 6 weeks of age. At approximately 10 weeks of age, animals at Arlington will be transported to Marshfield to continue the grower/finisher phase. At Marshfield, 10-week-old animals will be placed in groups of 6 animals (same milk feeding treatment and respective grower/finisher treatment) and remain in those groups the remainder of the study. When a group of animals is approximately 450 kg bodyweight, the animals will be moved to a separate pen to measure individual feed intake, growth, and efficiency for 60 days. At approximately 650 kg bodyweight and with indications of appropriate finish to grade choice, calves will be harvested at a commercial processing plant. A total of 96 calves will be used with bulls and heifers allocated equally to treatments. Individual calf will be the experimental unit in the milk feeding phase. The grower/finisher phase of the study will include 16 pens of 6 calves with 4 pens per treatment and pen considered the experimental unit.Experimental DesignWe will test 4 treatment combinations using a randomized complete block design with a 2x2 factorial arrangement of treatments.Milk replacer treatments:1) 22% protein/20% fat milk replacer fed at 5.7 L per day2) 26-28% protein/20% fat milk replacer fed at 7.6 L per dayGrower/finisher treatments:1) Calf-fed finish program with finish diet started at 175-200 kg bodyweight2) Grow/finish program with finish diet started at 300-325 kg bodyweightMeasurementsPre-weaning milk feeding phaseDaily feed intake and body weights at birth, 2, 4, and 6 weeks of age will be used to calculate efficiency. Ultrasound imaging of the loin muscle at weaning.Grower/finisher phaseDaily pen feeding and refusal amounts will be collected. Calves will be weighed at the start of the grower/finisher phase for 3 days and monthly thereafter. Pen-based feed efficiency will be calculated based on pen feed intakes and growth measures. Individual efficiencies will be calculated based on the feed intake measured during the 60-day feeding period. Body condition and ultrasound imaging will be used to estimate timing of harvest and provide measures of loin muscle shape. Prior to harvest, bodyweight will be measured for 3 days.Meat quality assessment phaseAnimals will be harvested with hot carcass weight and dressing % collected and after a 24-hour chill, USDA carcass quality and yield grade factors will evaluated. At fabrication, a subset (n=12) of the rib from carcasses will be chosen to represent the 4 treatments. The subsection will be evaluated for color, shear force, cook loss, shelf life, and sensory tenderness, juiciness and flavor characteristics.Planned AnalysisData will be analyzed as a randomized complete block design using a mixed model (Proc Mixed; SAS software version 9.4) to evaluate the fixed effects of the milk feeding program and grower/finisher feeding strategy. Analysis will be conducted for each phase and the final study results. For the pre-weaning phase, individual calf will be the experimental. For the grower/finisher phase, pen will be the experimental unit. Individual feed intakes and efficiency measures will be analyzed with individual animal considered the experimental unit. Objective 2: Develop an extension program to enable rapid adoption of recommended management practices of dairy beef crossbreds by dairy and beef producers Based upon research in Objective one, we will develop recommendations for feeding and management of dairy beef crossbreds.Extension White Paper and FactsheetsAn extension white paper with detailed and applicable results of the project, along with feeding and management recommendations can be easily understand and adopted. Short 1-page factsheets pertaining to the research results and recommendation to concisely provide information.Technology Transfer ArticlesArticles for dairy and livestock popular-press publications to expand the outreach of knowledge.Educational WorkshopsDuring project years two and three, on-farm workshops will be conducted to engage dairy and beef producers and provide education on current best management practices and updates on research results. Workshops will also allow for guided discussion among producers to enhance farmer-to-farmer learning.During project year three, a regional Cattle Feeder Workshop series will be conducted with 6-8 locations across WI. Results from the current project will be key information presented with emphasis on feeding strategy impacts on growth and carcass composition, and economics. To bring additional expertise an invited speaker with significant applied research experience with dairy beef production will be part of the program.Extension Seminars and WebinarsPresentations will be delivered at local and regional extension events organized by UW-Madison Extension personnel across WI. Extension webinar presentations (live and recorded) will be conducted to allow more flexible and wide-spread interactions for those are not able to attend in-person seminars. Webinars will be offered free of charge.Economic Analysis of Research ResultsUsing feed intake, growth, and carcass results, an economic analysis will be conducted. Income over feed costs and yardage will be calculated based upon feed intake, feed costs, days on feed, and sales information. In addition, scenarios with different days on feed and costs will be simulated.Budgeting ToolA modification of the Extension dairy steer feed budgeting tool will be made based on the results to include specific feed and growth estimates.Evaluation of Extension Program-To evaluate effectiveness of our extension program and change in knowledge and actions, we will track participation at the on-farm workshops, seminars, and webinars with feedback solicited after each event to determine increases in knowledge, additional information desired, and anticipated changes to management. Website access and downloads of extension resources will be tracked to evaluate more wide-spread usage of project results.