摘要
本试验旨在研究羔羊代乳料对雷州山羊生长性能、养分表观消化率、瘤胃发酵参数和菌群结构及健康状况的影响。选取体重相近、出生20日龄的健康雷州山羊公羔48只,分为代乳料组(饲喂代乳料+开食料)和母乳组(饲喂母乳+开食料),每组24个重复,每个重复1只羔羊。预试期10 d,正试期40 d。结果表明:1)代乳料组羔羊40日龄平均个体重、21~40日龄平均日增重及干物质、粗蛋白质、粗脂肪和粗灰分的表观消化率均显著低于母乳组(P<0.05);21~40日龄,代乳料组开食料平均日采食量显著高于母乳组(P<0.05),但平均日总采食量却显著低于母乳组(P<0.05),且腹泻率极显著高于母乳组(P<0.01)。2)代乳料组羔羊60日龄平均个体重、41~60日龄和21~60日龄平均日增重及各养分表观消化率均与母乳组相比差异不显著(P>0.05);代乳料组41~60日龄和21~60日龄开食料平均日采食量均极显著高于母乳组(P<0.01);代乳料组41~60日龄平均日总采食量显著高于母乳组(P<0.05),但21~60日龄2组间差异不显著(P>0.05);代乳料组41~60日龄和21~60日龄腹泻率与母乳组相比差异不显著(P>0.05)。60日龄时,瘤胃内容物氨态氮和挥发性脂肪酸含量、乙酸/丙酸值以及瘤胃菌群多样性指数2组间差异不显著(P>0.05);代乳料组瘤胃厚壁菌门和普雷沃氏菌属相对丰度均显著高于母乳组(P<0.05),其他菌群相对丰度2组间差异不显著(P>0.05);代乳料组断奶成活率比母乳组高6.67个百分点,弱羔率比母乳组低8.33个百分点。综上所述,与母乳喂养相比,20日龄断奶羔羊饲喂代乳料会降低21~40日龄生长性能和养分表观消化率,提高腹泻率;但对41~60日龄羔羊生长性能、养分表观消化率、瘤胃发酵参数和菌群结构以及健康状况无显著影响,且可以降低弱羔率。
This experiment was conducted to investigate the effects of lamb milk replacer on growth performance,nutrient apparent digestibility,rumen fermentation parameters,microflora structure and health status of Leizhou goats.Forty-eight healthy male Leizhou goats with similar body weight at 20 days of age were divided into milk replacer group(fed milk replacer+starter)and milk group(fed milk+starter)with 24 replicates per group and 1 lamb per replicate.The pre-trial period lasted for 10 days and the experimental period lasted for 40 days.The results showed as follows:1)the average body weight at 40 days of age,as well as the average daily gain and apparent digestibilities of dry matter,crude protein,ether extract and ash of lambs from 21 to 40 days of age in milk replacer group were significantly lower than those in milk group(P<0.05).From 21 to 40 days of age,the starter average daily feed intake in milk replacer group was significantly higher than that in milk group(P<0.05),but the average daily total feed intake was significantly lower than that in milk group(P<0.05),and the diarrhea rate was extremely significantly higher than that in milk group(P<0.01).2)There were no significant differences in the average body weight at 60 days of age,as well as the average daily gain and nutrient apparent digestibility of lambs from 41 to 60 days of age and 21 to 60 days of age in milk replacer group compared with milk group(P>0.05).The starter average daily feed intake in milk replacer group from 41 to 60 days of age and 21 to 60 days of age was extremely significantly higher than that in milk group(P<0.01).The average daily total feed intake in milk replacer group from 41 to 60 days of age was significantly higher than that in milk group(P<0.05),but there was no significant difference between the two groups from 21 to 60 days of age(P>0.05).The diarrhea rate in milk replacer group from 41 to 60 days of age and 21 to 60 days of age was not significantly different from that in milk group(P>0.05).At 60 days of age,there were no s
作者
杨讯业
牛志力
吴琼
刘英明
李兴华
赵志辉
尹福泉
高振华
YANG Xunye;NIU Zhili;WU Qiong;LIU Yingming;LI Xinghua;ZHAO Zhihui;YIN Fuquan;GAO Zhenhua(College of Coastal Agricultural Sciences,Guangdong Ocean University,Zhanjiang 524088,China;Sichuan Tequ Investment Group Co.,Ltd.,Chengdu 611430,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2023年第3期1758-1770,共13页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
广东省现代草牧业(羊)产业技术体系项目(2019KJ127)
广东省农业厅产业联盟项目[粤农计(2016LM3188)]
广东省研究生教育创新计划项目(2020SFKC041)
广东海洋大学研究生教育创新计划项目(校研究生〔2019〕10号)
广东海洋大学大学生创新创业训练计划项目(CXXL2019061)。
关键词
羔羊代乳料
生长性能
养分表观消化率
瘤胃发酵参数
瘤胃菌群结构
健康状况
lamb milk replacer
growth performance
nutrient apparent digestibility
rumen fermentation parameters
rumen microflora structure
health status
