Study of the Measurement Method and Influencing Factors of Intestinal Digestibility of Rumen Undegraded Protein
Introduction The intestinal digestibility of rumen undegraded protein (DRUP) is an important parameter in updated protein evaluation systems for ruminant production, and it has effects on milk yield and productivity of dairy cows (Frydrych, 1992).Currently, there are a large number of studies on rumen degradation rates of feeds, but little information available on the intestinal digestibility of the rumen undegraded protein (RUP)has been reported.Therefore, the intestinal digestibility is usually considered to be a fixed value in most protein evaluation systems (Frydrych, 1992).The methods for determining DRUP values mainly include the mobile nylon bag (MNB), the modified three-step in vitro (MTS), and the original three step in vitro (OTS).Among them, the in situ mobile nylon bag (MNB) method is widely accepted, however, it is an invasive procedure that requires the animal to be fitted with ruminal, duodenal and sometimes ileal fistula.
Xin Jiang Liyang Zhang Hongjian Xu YonggenZhang
College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, China
国际会议
The 5h International Symposium on Dairy Cow Nutrition and Milk Quality(第五届“奶牛营养与牛奶质量国际研讨会)
北京
英文
181-182
2017-05-05（万方平台首次上网日期，不代表论文的发表时间）