奶牛过瘤胃氨基酸生物利用率评价与应用  

Evaluation and Application of Rumen Protected Amino Acid Bioavailability in Dairy Cows

作　　者：卜登攀[1] 姚瑞芬 詹腾飞 BU Dengpan;YAO Ruifen;ZHAN Tengfei(State Key Laboratory of Animal Nutrition,Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,China;College of Animal Science and Technology,Beijing University of Agriculture,Beijing 102206,China)

机构地区：[1]中国农业科学院北京畜牧兽医研究所,动物营养学国家重点实验室,北京100193 [2]北京农学院动物科学技术学院,北京102206

出　　处：《动物营养学报》2022年第10期6396-6403,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国际原子能机构(IAEA)项目(No.CPR5025)。

摘　　要：过瘤胃氨基酸(RPAA)是经过特定方式加工的氨基酸,可降低瘤胃微生物的降解,增加到达小肠的可吸收氨基酸量,在提高反刍动物氨基酸供给和氮利用效率方面发挥重要作用。准确评估RPAA生物利用率是科学使用RPAA的基础,不同包被工艺影响RPAA的生物利用率。目前用于评价RPAA生物利用率的方法很多,但尚无统一标准化的评价方法。因此,本文主要对RPAA生物利用率的评价方法进行了简述,为进一步研究RPAA评价方法及其在奶牛上的应用提供参考。Rumen protected amino acid(RPAA)is an amino acid processed in a specific way,which can reduce the degradation of rumen microorganisms and increase the amount of amino acid available to the small intestine,and plays an important role in improving the amino acid supply and nitrogen utilization efficiency of ruminants.Accurate evaluation of RPAA bioavailability is the basis of scientific use of RPAA.Different coating processes affect the bioavailability of RPAA.At present,there are many methods to evaluate the bioavailability of RPAA,but there is no unified and standardized evaluation method.Therefore,this paper mainly summarized the evaluation methods of RPAA bioavailability,so as to provide reference for further study of RPAA evaluation method and its application in dairy cows.

关 键 词：过瘤胃氨基酸 生物利用率 奶牛 同位素标记 

分 类 号：S823[农业科学—畜牧学]