动物营养学报Issue(2)：418-425,8.DOI:10.3969/j.issn.1006-267x.2016.02.015
添加过瘤胃蛋氨酸、赖氨酸对荷斯坦奶公牛生长性能和胴体化学成分的影响
Effects of Rumen-Protected Methionine and Lysine Supplementations on Growth Performance and Carcass Chemical Composition of Holstein Bulls
摘要
Abstract
This experiment was conducted to investigate the effects of rumen-protected methionine ( RPMet) and lysine ( RPLys) supplementations on growth performance and carcass chemical composition of Holstein bulls, and to discuss the feasibility that RPMet and RPLys instead of part protein of diet.Twenty five Holstein bulls aged about 12 months with similar body weight and body measurements were selected and divided into 5 groups with randomized experiment design, and each group included 5 Holstein bulls.The control group was fed a basal diet, the experimental groups were fed the basal diet added with RPMet 15 g/d ( M15 group) , RPLys 30 g/d ( L30 group) , RPMet 15 g/d+RPLys 30 g/d ( M15+L30 group) and RPMet 15 g/d+RPLys 30 g/d ( meanwhile dietary crude protein content was lowered by 2.20%) ( LCP group) , respectively.Adap-tation and experimental periods lasted for 10 and 150 d, respectively.The results showed that compared with control group:1) dry matter intake was not affected by RPMet and RPLys supplementations ( P>0.05);L30, M15+L30, LCP groups significantly increased final weight and average daily gain ( P<0.05) , and the values reached the highest in M15+L30 group, but they were not significantly different from those in LCP group ( P>0.05); M15+L30 and LCP groups significantly decreased feed to gain ratio ( P<0.05) , and M15+L30 group had the minimum value, but the difference between M15+L30 and LCP groups was not significant ( P>0.05) . 2) Chest girth and carcass crude protein content in M15+L30 and LCP groups were significantly increased ( P<0.05) , while there was no significant difference between the two groups ( P>0.05) .3) M15+L30 and LCP groups significantly increased carcass essential amino acid contents including threonine, leucine and arginine ( P<0.05) , and the differences between the two groups were not significant ( P>0.05);M15+L30 group sig-nificantly increased isoleucine content ( P<0.05); M15+L30 and LCP groups had significantly higher non-es-sential amino acid contents including aspartate, serine, glutamic acid, glycine, alanine, cystine and proline and total amino acid content ( P<0.05); L30 and M15+L30 groups had significantly higher tyrosine content ( P<0.05) , but there was no significantly difference between the two groups ( P>0.05) .It is concluded that dietary supplementations of RPMet and RPLys can improve growth performance and increase carcass protein and amino acid contents of Holstein bulls, and the supplementation of RPMet 15 g/d+RPLys 30 g/d can in-stead part of dietary crude protein (2.20%).关键词
过瘤胃蛋氨酸/过瘤胃赖氨酸/荷斯坦奶公牛/生长性能/胴体化学成分Key words
RPMet/RPLys/Holstein bulls/growth performance/carcass chemical composition分类
农业科技引用本文复制引用
韩云胜,曲永利,袁雪,王志博,殷溪瀚,李伟,潘琪琪,王冠,高岩..添加过瘤胃蛋氨酸、赖氨酸对荷斯坦奶公牛生长性能和胴体化学成分的影响[J].动物营养学报,2016,(2):418-425,8.基金项目
国家科技部支撑项目“东北农区奶牛规模化健康养殖生产技术集成和产业化示范”（2012BAD12B05-01）；黑龙江省农垦总局项目“黑龙江垦区规模化奶牛场增产关键技术研究与示范” （）
