动物营养学报2016，Vol.28Issue(7)：2032-2044,13.DOI:10.3969/j.issn.1006-267x.2016.07.008
真胃灌注缺失精氨酸、苏氨酸或组氨酸的混合氨基酸对泌乳山羊乳腺氨基酸代谢的影响
Effects of Abomasul Infusion of Amino Acid Mixture without Arginine, Threonine and Histidine on Mammary Amino Acid Metabolism of Lactating Goats
摘要
Abstract
The purpose of this study was to determine the effects of abomasul infusion of amino acid ( AA ) mixture without arginine ( Arg) , threonine ( Thr) and histidine ( His) on mammary AA metabolism of lacta⁃ting goats. Four Saanen dairy goats at med⁃lactation period were selected and installed with abomasul ( for AA infusion), jugular arterial and breast intravenous fistula cannulas (for blood sample collection), as well as probes of blood flowmeter at external pudendal artery ( for mammary blood flow recording ) . Goats for trial were restricted fed a basal diet to meet energy and protein needs for maintenance. Abomasa were infused with glucose and AA mixed solution, which had same AA composition with ruminal microbial protein. A 4×4 Latin square design was used, control group was infused total AA mixture, and trial groups were infused AA mixture without one of Arg, Thr or His, respectively; the trial consisted of 4 stages with 7 d per stage, in each of which the first 4 d were infusion period, and the last 3 d were sampling period. The results showed as follows:1) infusion of AA mixture without single AA had no significant effects on milk yield and milk protein yield ( P>0.05) . 2) Infusion of AA mixture without Arg or Thr significantly increased mammary blood flow ( P≤0.05) , but reduced the concentrations of the missing AA in artery and vein, and the AA clear rates of mamma⁃ry glands were increased by 25.9% and 199%; infusion of AA mixture without single AA had no significant effects on absorbed amount to yield of AA of mammary glands (P>0.05). 3) Infusion AA mixture without Arg, Thr or His increased AA conversion efficiency of lactation of mammary glands by 25. 4% ( 4. 02 vs. 5.04,P≤0.05), 34.5% (9.09 vs. 12.23,P≤0.05) and 14.6% (10.51 vs. 12.04,0.05<P≤0.10), respec⁃tively. The results indicate that dairy goats increase the supplementation of mammary gland lacking AA from di⁃et through increasing mammary blood flow and mammary clear rate, and improve conversion efficiency of lac⁃tation of the lacking AA.关键词
氨基酸/乳腺血流量/泌乳性能/泌乳转化效率Key words
amino acid/mammary blood flow/lactating performance/conversion efficiency of lactation分类
农业科技引用本文复制引用
胡志勇,孙得俸,李继伟,闫振贵,林雪彦,王中华..真胃灌注缺失精氨酸、苏氨酸或组氨酸的混合氨基酸对泌乳山羊乳腺氨基酸代谢的影响[J].动物营养学报,2016,28(7):2032-2044,13.基金项目
国家现代农业（奶业）产业技术体系（ CARS-37）；山东省牛产业技术体系（ SDAIT-12-011-06）；国家自然科学基金 （）
