半胱胺螯合锌对育肥猪生长性能、养分表观消化率、胴体性状及肉品质的影响  

Effects of Cysteamine Chelated Zinc on Growth Performance,Nutrient Apparent Digestibility,Carcass Traits and Meat Quality of Finishing Pigs

作　　者：王煜琦 唐敏 于光辉[1] 宋俊霖 姜建阳[1] 宋春阳[1] WANG Yuqi;TANG Min;YU Guanghui;SONG Junlin;JIANG Jianyang;SONG Chunyang(College of Animal Science and Technology,Qingdao Agricultural University,Qingdao 266109,China)

机构地区：[1]青岛农业大学动物科技学院

出　　处：《动物营养学报》2020年第1期120-128,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：山东省现代农业产业技术体系生猪创新团队项目(SDAIT-08-08)

摘　　要：本试验旨在研究饲粮添加不同水平半胱胺螯合锌(Zn-CS)对育肥猪生长性能、养分表观消化率、胴体性状及肉品质的影响。试验选取(64.67±1.15)kg的“杜长大”育肥猪90头,随机分为5个组,每组3个重复(圈),每个重复6头,公母各占1/2。Ⅰ组为对照组,饲喂基础饲粮;Ⅱ组、Ⅲ组、Ⅳ组和Ⅴ组为试验组,分别在基础饲粮中添加60、90、120和150 mg/kg的Zn-CS。预试期为7 d,正试期为60 d。试验结束时每个重复随机抽取1头猪进行屠宰测定。结果表明:1)与对照组相比,Ⅲ组、Ⅳ组、Ⅴ组育肥猪平均日增重显著提高(P<0.05),Ⅲ组、Ⅴ组料重比有降低趋势(P>0.05)。2)与对照组相比,Ⅴ组育肥猪粗蛋白质表观消化率提高了3.47%(P>0.05)。3)与对照组相比,Ⅲ组、Ⅳ组育肥猪胴体瘦肉率分别提高了6.14%、5.51%(P>0.05);饲粮中添加Zn-CS对育肥猪的肉品质指标均无显著影响(P>0.05)。4)与对照组相比,Ⅲ组育肥猪肌肉天门冬氨酸含量提高了7.65%(P>0.05),Ⅲ组、Ⅳ组育肥猪肌肉异亮氨酸含量分别提高了9.09%、7.95%(P>0.05),Ⅲ组、Ⅳ组、Ⅴ组育肥猪肌肉组氨酸含量分别提高了7.22%、8.25%、7.22%(P>0.05)。5)肌肉脂肪酸组成方面,与对照组相比,Ⅲ组、Ⅳ组育肥猪肌肉硬脂酸含量分别降低了7.67%、7.99%(P>0.05),肌肉亚油酸含量分别提高了5.29%、5.50%(P>0.05)。由此可见,饲粮中添加Zn-CS能够改善育肥猪的生长性能,提高粗蛋白质表观消化率,提高育肥猪的瘦肉率,并提高肌肉亚油酸、组氨酸、天门冬氨酸和异亮氨酸含量,从而改善肉品质。本试验条件下,综合各项结果,建议育肥猪饲粮中Zn-CS的添加水平为90 mg/kg。This experiment was conducted to investigate the effects of different dietary levels of cysteamine chelated zinc(Zn-CS)on growth performance,nutrient apparent digestibility,carcass traits and meat quality of finishing pigs.Ninety finishing pigs(Duroc×Landrace×Yorkshire)with average body weight of(64.67±1.15)kg were selected and randomly divided into 5 groups with 3 replicates(pens)per group and 6 pigs in each replicate(half male and half female).Pigs in the control group(groupⅠ)were fed a basal diet,and those in the experiment groups(groupsⅡ,Ⅲ,Ⅳ and Ⅴ)were fed the basal diet supplemented with 60,90,120 and 150 mg/kg Zn-CS,respectively.The trial period was 60 days after 7-day preliminary trial period.In the end,one pig in each replicate was randomly slaughtered.The results showed as follows:1)compared with the control group,the average daily gain of finishing pigs in groups Ⅲ,Ⅳ and Ⅴwas significantly increased(P<0.05),and the ratio of feed to gain in groupsⅢ and Ⅴ was tended to be decreased(P>0.05).2)Compared with the control group,the crude protein apparent digestibility of finishing pigs in group Ⅴ was increased by 3.47%(P>0.05).3)Compared with the control group,the lean meat rate of finishing pigs in groupsⅢ and Ⅳ was increased by 6.14%and 5.51%,respecitively(P>0.05),and the Zn-CS supplementation had no significant effects on meat quality of finishing pigs(P>0.05).4)Compared with the control group,the muscle aspartate content of finishing pigs in groupⅢ was increased by 7.65%(P>0.05),the muscle isoleucine content of finishing pigs in groupsⅢ and Ⅳ was increased by 9.09%and 7.95%,respectively(P>0.05),and the muscle histidine content of finishing pigs in groupsⅢ,ⅣandⅤwas increased by 7.22%,8.25%and 7.22%,respectively(P>0.05).5)In terms of fatty acid composition in muscle,compared with the control group,the stearic acid content of finishing pigs in groupsⅢ and Ⅳ was decreased by 7.67%and 7.99%,respecitively(P>0.05),and the linoleic acid content was increased by 5.29% an

关 键 词：半胱胺螯合锌 育肥猪 生长性能 胴体性状 肉品质 

分 类 号：S816[农业科学—饲料科学]