动物营养学报2016，Vol.28Issue(9)：2936-2942,7.DOI:10.3969/j.issn.1006-267x.2016.09.033
饲粮中添加过瘤胃蛋氨酸、过瘤胃赖氨酸对荷斯坦奶公牛肉用生产性能和肉品质的影响
Effects of Rumen-Protected Methionine and Rumen-Protected Lysine Supplementations in Diets on Meat Production Performance and Meat Quality of Holstein Bulls
摘要
Abstract
This experiment was conducted to investigate the effects of rumen-protected methionine ( RPMet) and rumen-protected lysine ( RPLys) supplementations in diet on meat production performance and meat quali-ty of Holstein bulls. Twenty five Holstein bulls aged about 12 months with similar body weight were selected and divided into 5 groups by random experiment design, and each group included 5 replicates with 1 bull per replicate. The control group was fed a basal diet ( ranch practical diet) , and the other 4 groups were fed the basal diet added with RPMet 15 g/d ( RPM group) , RPLys 30 g/d ( RPL group) , RPLys 30 g/d+RPMet 15 g/d ( RPL+M group) and RPLys 30g/d+RPMet 15g/d ( meanwhile dietary crude protein level was low-ered 1.71%) [RPL+M(L) group], respectively. Adaptation and experimental periods lasted for 10 and 150 d, respectively. The results showed as follows: 1 ) RPL+M and RPL+M ( L ) groups had significantly higher finial weight, average daily gain than control group ( P<0.05) , and had significantly lower ratio of feed to gain than control group ( P<0.05) , but there were no differences between the above two groups ( P>0.05);the highest economic benefit of farming was RPL+M (L) group [7.67 RMB/(d·bull)], which was 0.32 RMB/(d·bull) higher than that of RPL+M group. 2) Compared with control group, meat percentage was not affected by RPMet and RPLys supplementations ( P>0.05); RPM, RPL, RPL+M and RPL+M( L) groups had significantly higher body weight before slaughter (P<0.05), and the value reached the highest in RPL+M group, but they were not significantly different from those in RPL+M(L) group (P>0.05); RPL group had significantly higher dressing percentage ( P<0.05); all experimental groups had significantly higher meat percentage of carcass and ratio of meat to bone (P<0.05), and there were no significant differences a-mong experimental groups ( P>0.05) . 3) RPMet and RPLys supplementations in diet had no significant effects on eye muscle area, shear force, cooked meat rate, marbling degree, pH and meat color degree (P>0.05). 4) There was no significant difference on muscle fatty acid composition ( P>0.05) . It is concluded that dietary supplementations of RPMet and RPLys can maintain similar meat quality and muscle fatty acid composition of Holstein bulls, and can improve meat production performance;and the supplementations of RPMet and RPLys can instead part of protein feed, and can increase the economic benefit of farming.关键词
过瘤胃蛋氨酸/过瘤胃赖氨酸/奶公牛/肉用生产性能/肉品质Key words
RPMet/RPLys/bulls/meat production performance/meat quality分类
农业科技引用本文复制引用
高岩,吴健豪,曲永利,潘琪琪,张士博,韩天龙,王志博,殷溪瀚..饲粮中添加过瘤胃蛋氨酸、过瘤胃赖氨酸对荷斯坦奶公牛肉用生产性能和肉品质的影响[J].动物营养学报,2016,28(9):2936-2942,7.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) （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”( HNK125B-11-02) （ HNK125B-11-02）
