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当前位置: 首页 > 文章 > 保护性蛋氨酸对中国荷斯坦奶牛血浆代谢产物及生产性能的影响 甘肃农业大学学报 2004,39 (4) 394-398
Position: Home > Articles > Effects of ruminally protected methtionine on plasma metabolites and production performance in Chinese Holstein cows Journal of Gansu Agricultural University 2004,39 (4) 394-398

保护性蛋氨酸对中国荷斯坦奶牛血浆代谢产物及生产性能的影响

作  者：
熊春梅;张力;周学辉;蒋学勤;郭爱伟;朱军;公双平
单  位：
甘肃农业大学动物科学技术学院;中国农业科学院兰州畜牧与兽药研究所;宁夏农牧厅
关键词：
中国荷斯坦奶牛;保护性蛋氨酸;产奶量;乳成分;血浆代谢产物
摘  要：
选择25头中国荷斯坦奶牛,分成对照组,试验一组(添加30 g DL-蛋氨酸),试验二组(添加45 g保护性蛋氨酸),试验三组(添加30 g DL-蛋氨酸+50 g L-赖氨酸)和试验四组(添加45 g保护性蛋氨酸+50 g L-赖氨酸)进行饲养试验。试验表明:试验四组和试验二组产奶量显著(P<0.05)高于对照组,分别提高6.31 %和6.73 %,其他组差异不显著(P>0.05);试验四组和试验二组乳脂率显著(P<0.05)高于对照组,分别提高6.25 %和6.55 %;并且试验四组和试验二组乳脂率也显著(P<0.05)高于试验一组。乳蛋白、体细胞数、全脂固形物和非脂固形物各组间差异不显著(P>0.05)。试验四组和试验二组血浆白蛋白和总蛋白显著高于对照组(P<0.05),其它各组差异不显著(P>0.05)。试验二组血浆尿素氮(PUN)显著低于对照组和试验一组(P<0.05),其他各组差异不显著(P>0.05)。血浆游离脂肪酸和总氨基酸浓度各组差异不显著(P>0.05)。由此得出结论:一方面,保护性蛋氨酸(RPMet)的一部分能避免瘤胃微生物的降解,以保护性Met的形式提供给瘤胃后Met;另一方面,保护性蛋氨酸的降解部分改善了瘤胃的发酵,促进瘤胃微生物的合成,这两方面的作用提高了奶牛的产奶量和乳成分。
译  名：
Effects of ruminally protected methtionine on plasma metabolites and production performance in Chinese Holstein cows
作  者：
XIONG Chun-mei1, ZHANG Li2, ZHOU Xue-hui2, JIANG Xue-qing3, GUO Ai-wei1, ZHU Jun3, GONG Shuang-ping3 (1. College of Animal Science, Gansu Agricultural University, Gansu,Lanzhou 730070; 2. Lanzhou Institute of Animal Husbandry and Animal Medicine, Chinese Academy of Agricultural Science, Gansu, Lanzhou 730050; 3. Ningxia Bureau of Agricultural and Husbandry Science, Ningxia, Yinchuan 750021, China)
关键词：
Chinese Holstein cows; ruminally protected methtionine (RPMet); milk production; composition of milk; plasma metabolite
摘  要：
Twenty-five individuals of Chinese-Holstein cows with high-producing were arranged randomly into five groups, i.e. control, treatment 1 (added 30 gDL-Met), treatment 2 (added 45 g RPMet), treatment 3 (added 30 g DL-Met+50 g L-Lys) and treatment 4 (added 45 g RPMet +50 g L-Lys), aiming to reveal the effects of ruminally protected methtionine(RPMet) with different treatments on blood plasma metabolites, milk production and milk constituents. The results showed that the milk production in treatment 4 and treatment 2 (P<0.05) increased by 6.31 % and 6.73 % respectively. Milk fat percentages in treatment 4 and treatment 2 were 6.25 % and 6.55 % respectively greater than control (P<0.05) and significantly higher than treatment 1 (P<0.05). Whereas five groups had no differences (P>05) in milk protein percentages, somatic cell counts, solids and solids-not-fat in milk. Plasma albumin and total protein were higher (P<0.05) in treatment 4 and treatment 2 than other groups, and PUN of treatment 2 was the lowest (P<0.05) in five groups. TAA and NEFA were not affected by supplemental AA (P>0.05). It can be concluded that ruminally protected methtionine(RPMet) survived rumen microbial degradation to provide a rumen-protected form of methionine(Met) , and it enhanced ruminal fermentation and improved microbe synthesis, so milk production and composition of milk were improved.

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