Protective Effects of Rumen Protected Choline in Dairy Cows  

作　　者：XIAO Jin GAO Yan-xia CAO Yu-feng LI Qiu-feng LI Jian-guo 

机构地区：[1]College of Animal Science and Technology, Agricultural University of Hebei, Baoding 071000, China

出　　处：《Animal Husbandry and Feed Science》2010年第4期26-28,31,共4页动物与饲料科学（英文版）

基　　金：funded by the grants from the National Key Technology R&D Program (2006BAD04A10);Major Scientific and Technological Innovation Projects of Hebei Province(07227146Z);National Special Research Fund for Public Welfare (Agriculture) of China (nyhyzx07-036-04 );Earmarked Fund for Modern Agro-industry Technology Research System (nycytx-10)

摘　　要：Choline is a necessary nutrient for dairy cows and contributes to milk yield, but most of dietary choline can be degraded by the microorganisms in rumen. Rumen protected choline （RPC） has been developed to protect choline from degradation. To screen stable RPC, choline chloride was coated with acrylic resin no. IV, chitosan and the mixture containing the two lagging covers by fluidized bed coating technology, respectively. Their stability was evaluated in vitro and in situ. The results showed that release rate of RPC coated with acrylic resin no. IV and chitosan was the lowest in rumen and pH 6.6 buffer. And its effective protection rate reached 62.04% in rumen. Therefore, RPC coated with acrylic resin no. IV and chitosan has good stability and protection efficacy in rumen, and it can be used in practice to supply effective choline for the ruminant.Choline is a necessary nutrient for dairy cows and contributes to milk yield, but most of dietary choline can be degraded by the microorganisms in rumen. Rumen protected choline （RPC） has been developed to protect choline from degradation. To screen stable RPC, choline chloride was coated with acrylic resin no. IV, chitosan and the mixture containing the two lagging covers by fluidized bed coating technology, respectively. Their stability was evaluated in vitro and in situ. The results showed that release rate of RPC coated with acrylic resin no. IV and chitosan was the lowest in rumen and pH 6.6 buffer. And its effective protection rate reached 62.04% in rumen. Therefore, RPC coated with acrylic resin no. IV and chitosan has good stability and protection efficacy in rumen, and it can be used in practice to supply effective choline for the ruminant.

关 键 词：Rumen protected choline Holstein cows Release rate 

分 类 号：S816.7[农业科学—饲料科学] S823.91[农业科学—畜牧学]