动物营养学报Issue(2)：363-370,8.DOI:10.3969/j.issn.1006-267x.2014.02.011
瘤胃保护性蛋氨酸和赖氨酸补饲量对泌乳荷斯坦奶牛生产性能及血浆生化指标的影响
Effects of Supplemental Levels of Rumen-Protected Methionine and Lysine on Performance and Plasma Biochemical Indices of Lactating Holstein Cows
摘要
Abstract
This experiment was conducted to investigate the effects of the supplementatl levels of rumen-protec-ted methionine ( RPMet) and lysine ( RPLys) on performance and plasma biochemical indices of lactating Hol-stein cows under typical dietary condition in northern China.One hundred and sixty lactating Holstein cows in peak lactation period and with milk yield produced about 30 kg/d were selected and randomly allotted to four groups with 40 cows in each group.Cows in control group were fed a basal diet, and those in experimental groups were fed the basal diet supplemented with 13 g/d RPMet+6 g/d RPLys ( M13+L6 group) , 43 g/d RPMet+98 g/d RPLys ( M43+L98 group) , and 74 g/d RPMet+190 g/d RPLys ( M74+L190 group) ,re-spectively.The experiment consisted of a 10-day pre-experimental period and a 50-day experimental period. The results showed as follows:1 ) dietary supplementation of RPMet and RPLys had no significant effects on dry matter intake ( P>0 .05 ) .2 ) Milk yield, milk fat yield and lactose yield in M74+L190 group were sig-nificantly higher than those in control group and M13 +L6 group ( P <0 .05 ) , while milk urinary nitrogen concentration was significantly lower than that in control group and M13 +L6 group ( P<0 .05 ) .3 ) Com-pared with control group, plasma lysine concentration in M74+L190 group was significantly increased ( P<0 .05 ) , while plasma urinary nitrogen concentration was significantly decreased ( P<0 .05 ); plasma methio-nine and triglyceride concentrations in M43+L98 and M74+M190 groups were significantly increased ( P<0.05).In conclusion, under the typical dietary condition of northern China, the supplementation of RPMet and RPLys can improve performance of lactating cows in peak locating period, and the suitable supplemental levels of RPMet and RPLys for cows produced about 30 kg/d milk are 74 and 190 g/d, respectively.关键词
泌乳/奶牛/瘤胃保护性蛋氨酸/瘤胃保护性赖氨酸/产奶量/血浆生化指标Key words
lactation/cows/rumen-protected methionine/rumen-protected lysine/milk yield/plasma bio-chemical indices分类
农业科技引用本文复制引用
刘飞,林雪彦,侯秋玲,王云,王中华..瘤胃保护性蛋氨酸和赖氨酸补饲量对泌乳荷斯坦奶牛生产性能及血浆生化指标的影响[J].动物营养学报,2014,(2):363-370,8.基金项目
国家农业（奶业）产业技术体系 （）
