精料补饲水平对藏羊屠宰性能和器官发育的影响  

Effects of concentrate supplementation amount on slaughter performance and organ development of Tibetan sheep

作　　者：王彩莲[1] 吴建平[1,2] 刘立山 郎侠 宋淑珍[1] 王斐[1] WANG Cailian;WU Jianping;LIU Lishan;LANG Xia;SONG Shuzhen;WANG Fei(Institute of Animal&Pasture Science and Green Agricultural/Key Laboratory for Sheep,Goat and Cattle Germplasm and Straw Feed in Gansu Province,Gansu Academy of Agricultural Science,Lanzhou 730070,Gansu,China;Institute of Rural Development of Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃省农业科学院畜草与绿色农业研究所/甘肃省牛羊种质与秸秆饲料化重点实验室,甘肃兰州730070 [2]西北师范大学新农村发展研究院,甘肃兰州730070

出　　处：《草业科学》2021年第2期348-357,共10页Pratacultural Science

基　　金：国家自然科学基金地区基金(31760683);甘肃省重点研发计划(18YF1NA091)。

摘　　要：选用40只初始体重为(30.21±1.42)kg的9月龄欧拉型藏羊(Oura-type Tibetan sheep,OTTS)(高原型)羯羊,随机分为4组,每组10只,在放牧的基础上每只羊每天分别补饲0、0.1、0.2和0.3 kg精料,预试期15 d,正试期195 d,旨在研究精料补饲水平对藏羊屠宰性能和器官发育的影响。结果表明:补饲精料显著提高了OTTS的屠宰性能(P<0.05);提高了其头、皮+毛、心脏、肝脏、肺脏、肾脏、大肠占体质量的百分比(P>0.05),降低了胃、小肠、胃肠道及其内容物占体质量的百分比(P>0.05);提高了胃内容物占总胃肠道内容物的百分比及大肠内容物占整个肠道内容物的百分比(P>0.05);降低了肠道占体长的倍数;提高了胃的容积(P>0.05)。初步说明,冷季补饲精料可提高OTTS屠宰性能,刺激器官发育,改变胃肠道内容物的分布。本研究为高海拔地区发展藏羊产业、改善藏羊器官发育和调控其胃肠道内容物分布提供理论依据。The object of this research was to investigate the effects of concentrate supplementation amount on the slaughter performance and organ development of Tibetan sheep.Forty nine-month-old Oura-type Tibetan sheep(OTTS)(plateau type)(30.21±1.42)kg were selected and randomly divided into 4 groups with 10 replicates in each group.Every day 0,0.1,0.2 and 0.3 kg concentrate supplementation was provided for each sheep after grazing.The experiment included a 15-day pretrial period and a 195-day trial period.The results showed that supplementary feed significantly improved the slaughter performance of OTTS(P<0.05).The percentage of body weight of the head,skin+wool,heart,liver,lungs,kidneys,and large intestine increased,whereas the stomach,small intestine,gastrointestinal tract,and gastrointestinal contents decreased as the amount of concentrate supplementation increased(P>0.05).The percentage of stomach contents in the total contents of the gastrointestinal tract and that of large intestine contents in the total contents of the intestinal tract increased as the amount of concentrate supplementation increased(P>0.05).The intestinal length,proportional to body length decreased and stomach volume increased as the amount of concentrate supplement increased(P>0.05).The preliminary results showed that supplementary feed could improve slaughter performance,stimulate organ development,and change the distribution of gastrointestinal contents of OTTS in the cold season.This study provides a theoretical basis for the development of the Tibetan sheep industry,improvement of organ development,and regulation of gastrointestinal content distribution in Tibetan sheep in high-altitude areas.

关 键 词：欧拉型藏羊 冷季 生产性能 组织器官 胃肠道 胃内容物 肠道内容物 

分 类 号：S826.5[农业科学—畜牧学]