动物营养学报2016，Vol.28Issue(12)：215-222,8.DOI:10.3969/j.issn.1006-267x.2016.12.027
奶牛常用饲料康奈尔净碳水化合物－蛋白质体系中含氮化合物组分含量与可利用氨基酸含量之间的关系
Relationships between Contents of Nitrogenous Fractions of Cornell Net Carbohydrate and Protein System and Utilizable Amino Acids of Major Feeds for Dairy Cows
摘要
Abstract
To predict the utilizable amino acid ( uAA) contents of major feeds for dairy cows, twenty⁃one dif⁃ferent feed samples were collected and analyzed for the contents of crude protein ( CP) , ether extract ( EE) , neutral detergent fibre ( NDF) , acid detergent fibre ( ADF) , soluble crude protein ( SCP) , non⁃protein nitro⁃gen ( NPN ) , neutral detergent unsoluble crude protein ( NDIP ) and acid detergent unsoluble crude protein ( ADIP) . The contents of nitrogenous fractions including non⁃protein nitrogen ( PA ) , rapidly degraded true protein (PB1), intermediately degraded true protein (PB2), slowly degraded true protein (PB3) and unutiliz⁃able protein ( PC) were calculated according to CNCPS. The contents of amino acids of feed samples were also analyzed. The contents of uAAs of feeds were calculated based on the relationships between feed amino acid and uAA. The results showed that the CNCPS nitrogenous fraction ( PA, PB1, PB2, PB3 and PC) contents (% DM) were highly correlated with uAA, utilizable methionine ( uMet) , utilizable lysine ( uLys) and utiliz⁃able leucine ( uLeu) contents (% DM), and the regression equations were as follows: uAA=0. 171PA+0.134PB1+0.364PB2+0. 370PB3+0. 148PC+7. 785, R2 =0. 99, P<0.01; uMet=0. 019PA-0. 031PB1+0.024PB2+0.078PB3-0. 004PC-0. 071, R2 =0. 93, P<0. 01; uLys=-0.045PA-0. 020PB1+0. 072PB2+0.038PB3-0.011PC+0. 780, R2 =0. 92, P<0. 01; uLeu=0. 071PA+0.033PB1+0. 093PB2+0. 189PB3+0.003PC+0.006, R2=0.94, P<0.01. It is concluded that uAA, uMet, uLys and uLeu of feeds for dairy cows can be predicted based on the CNCPS nitrogenous fraction contents and the equations established in the trial.关键词
奶牛/康奈尔净碳水化合物-蛋白质体系/可利用氨基酸Key words
dairy cow/CNCPS/utilizable amino acid分类
农业科技引用本文复制引用
包愈,胡聪,赵广永..奶牛常用饲料康奈尔净碳水化合物－蛋白质体系中含氮化合物组分含量与可利用氨基酸含量之间的关系[J].动物营养学报,2016,28(12):215-222,8.基金项目
现代农业产业技术体系北京市创新团队 （）
