Evaluation of valine requirement of the commercial layer using a corn-soybean meal basal diet.
An experiment was conducted with Hy-Line W-36 hens to evaluate the Val requirement in a corn-soybean meal diet. Eight experimental diets were fed with Val levels of 0.700, 0.665, 0.630, 0.595, 0.560, and 0.525%. A positive control (0.765% Val) was fed. Egg production (EP) was increased by addition of Val to 0.630%. Egg weight (EW) was increased by addition of Val to 0.655%. Broken-line regression indicated a daily Val requirement of 592.5, 677.7, and 619.0 mg/hen per d for EP, EW, and egg contents (EC), respectively. This requirement was 13.1 mg/g of EC.
Department of Dairy and Poultry Sciences, University of Florida, Gainesville 32611, USA. Harms@dps.ufl.edu
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D000821:Animal Feed; D000818:Animals; D002645:Chickens / Q000378:metabolism* / Q000502:physiology; D004044:Dietary Proteins / Q000378:metabolism; D005260:Female; D009751:Nutritional Requirements; D010058:Oviposition; D012044:Regression Analysis; D013025:Glycine max; D014633:Valine / Q000378:metabolism*; D003313:Zea mays
D004044:Dietary Proteins; D014633:Valine