青贮桑叶对湖羊生产性能和肉品质的影响  

Effects of Silage Mulberry Leaves on Production Performance and Meat Quality of Hu Sheep

作　　者：马慧慧[1] 徐彬[1] 魏凤仙[1] 李文嘉 孙全友[1] 王琳燚[1] 邓文[1] 付趁 李绍钰[1] MA Huihui;XU Bin;WEI Fengxian;LI Wenjia;SUN Quanyou;WANG Linyi;DENG Wen;FU Chen;LI Shaoyu(Institute of Animal Husbandry and Veterinary Science,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)

机构地区：[1]河南省农业科学院畜牧兽研究所,河南郑州450002

出　　处：《河南农业科学》2022年第8期134-142,共9页Journal of Henan Agricultural Sciences

基　　金：河南省畜禽繁育与营养调控重点实验室开放课题;河南省农业科学院2019年度自主创新项目(2019ZC44);河南省农业科学院青年国际交流基金项目。

摘　　要：为探究不同比例青贮桑叶对育肥湖羊生产性能、肉品质的影响,选取160只平均体质量为(19.12±1.04)kg的健康湖羊,随机分为4组,每组5个重复(栏),每个重复8只,其中Ⅰ组为对照组,饲喂以花生秧为唯一粗饲料的基础饲粮,Ⅱ、Ⅲ、Ⅳ组以青贮桑叶代替部分花生秧,青贮桑叶与花生秧的比例分别为15∶85、30∶70、45∶55。试验期60 d。结果表明,各组平均日采食量、平均日增质量、料重比和屠宰性能指标差异均不显著(P>0.05)。Ⅱ、Ⅲ、Ⅳ组肌肉蒸煮损失和剪切力分别较Ⅰ组显著降低17.14%、19.54%、16.57%和7.92%、9.50%、6.75%;Ⅲ、Ⅳ组肌肉中粗蛋白含量分别较Ⅰ组显著升高9.31%、8.27%;Ⅲ组肌肉棕榈酸含量显著低于Ⅰ、Ⅱ、Ⅳ组;Ⅲ、Ⅳ组肌肉中a-亚麻酸、花生二烯酸含量显著高于Ⅰ组;Ⅱ、Ⅲ、Ⅳ组肌肉中饱和脂肪酸含量分别较Ⅰ组显著降低6.00%、10.29%和7.03%;Ⅲ组单不饱和脂肪酸含量显著高于其他组,Ⅳ组多不饱和脂肪酸含量显著高于其他组(P<0.05)。Ⅲ、Ⅳ组湖羊背最长肌中的天门冬氨酸、谷氨酸、亮氨酸、赖氨酸、色氨酸、总氨基酸、鲜味氨基酸含量均显著高于Ⅰ、Ⅱ组(P<0.05)。由此可见,饲粮中添加青贮桑叶在不影响育肥湖羊生长性能、屠宰性能的情况下,可改善肉品质、提高肌肉中不饱和脂肪酸含量和氨基酸含量,以补饲青贮桑叶30%时效果最优。This study was conducted to study the effects of silage mulberry leaves on growth performance,meat quality of Hu sheep.160 healthy Hu sheep with average weight of(19.12±1.04)kg were randomly divided into four groups with five replicates in each group and eight sheep in each replicate.The control group(groupⅠ)was fed with peanut seedlings,and the mulberry leaves and peanut seedlings were mixed at 15∶85(groupⅡ),30∶70(groupⅢ)and 45∶55(groupⅣ)in treatment groups,respectively.The experimental period lasted for 60 days.The results showed that average daily feed intake,average daily gain,feed to gain ratio and slaughter performance indexes were not significantly different among the groups(P>0.05).The muscle cooking loss and shear force of experimental groupsⅡ,ⅢandⅣwere reduced by 17.14%,19.54%,16.57%and 7.92%,9.50%,6.75%compared with those in groupⅠ,respectively.The protein content in the muscle of Hu sheep in groupsⅢandⅣwere increased by 9.31%and 8.27%compared with that in groupⅠ,respectively.The content of palmitic acid in the muscle of groupⅢwas significantly lower than that of groupsⅠ,ⅡandⅣ.The contents of a-linolenic acid and arachidonic acid in muscle of groupsⅢ,Ⅳwere significantly higher than those of groupⅠ.The contents of saturated fatty acids in the muscles of groupsⅡ,ⅢandⅣwere reduced by 6.00%,10.29%and 7.03%compared with that in groupⅠ,respectively.The content of monounsaturated fatty acids in groupⅢwas significantly higher than that in other groups,and the content of polyunsaturated fatty acids in groupⅣwas significantly higher than that in other groups(P<0.05).The contents of aspartic acid,glutamic acid,leucine,lysine,tryptophan,total amino acids,and flavor amino acids in the longissimus dorsi muscle of Hu sheep in groupsⅢandⅣwere significantly higher than those in groupsⅠandⅡ(P<0.05).In conclusion,silage mulberry leaves have certain promoting effects on meat quality and contents of amino acid and unsaturated fatty acid in muscle of Hu sheep,an

关 键 词：青贮桑叶 湖羊 生产性能 肉品质 氨基酸 脂肪酸 

分 类 号：S816.5[农业科学—饲料科学]