Effects of feeding Iowa-grown field peas on finishing pig performance
نویسندگان
چکیده
The objective of this study was to investigate an alternative feedstuff, Iowa-grown field peas, for finishing pigs. Field peas (winter, spring, and summer types) grown in southeast Iowa during 2005 and 2006 were sampled and analyzed for nutrient content. Overall, the peas averaged 86% DM, 2.8% ether extract, 5.7% crude fiber, 3% ash, 19.3% CP, 1.54% lysine, 0.20% methionine, 0.18% tryptophan, and 0.74% threonine. Finishing pigs, barrows (n = 64), were randomly assigned to 16 pens with four pigs each. There were four replications per treatment group. Each pen was assigned one of the four diets. The four diets were: 1) winter pea 30% of the total diet (by weight), 2) summer pea 30%, 3) spring pea 30%, and 4) corn-soybean meal as the control. The three pea diets contained corn but no soybean meal. Each of the four diets had 0.64% lysine based on calculated analysis. Crystalline amino acids (lysine, tryptophan and threonine) were added to the pea diets. The pigs started the experiment at 80 ± 2.5 kg live weight and were fed the experimental diets for This project was supported by Hatch Act, State of Iowa funds, USDA-SARE grant and Leopold Center for Sustainable Agriculture. The authors gratefully acknowledge ISU Swine Nutrition Research Farm staff for animal care and A. Penner for help with the data collection. Mention of company or product names is for presentation clarity and does not imply endorsement by the authors or Iowa State University, nor the exclusion of any other products that may be suitable for application. Correspondence: 32 Curtiss Hall, Iowa State University, Ames, IA, 50010 (phone: 515-2944621; fax: 515-294-6210; E-mail: [email protected]). Department of Animal Science, Iowa State University
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