9Zhao G Y,Lebzien P.Development of an in vitro incubation technique for the estimation of the utilizable crude protein (uCP) in feeds for cattle[J].Archives of Animal Nutrition,2000,153(3):293-302. 被引量:1
10Agricultural Research Council (ARC).The nutrient requirements of ruminant livestock.Farnham Royal:Commonwealth Agricultural Bureau,1965. 被引量:1