摘要
试验旨在探究不同能量水平日粮对舍饲戈壁短尾羊妊娠母羊生长性能、血清生化指标、瘤胃发酵参数和瘤胃微生物区系的影响。选取60只月龄、体况、体重(43.64±2.19) kg的健康妊娠期戈壁短尾羊,随机分为3组,每组4个重复,每个重复5只羊。各组母羊分别饲喂不同能量水平日粮,对照组日粮代谢能为7.98 MJ/kg,试验1组日粮代谢能为6.37 MJ/kg,试验2组日粮代谢能为4.77 MJ/kg。预试期15 d,正式试验期45 d。结果显示,试验2组母羊末重及平均日增重极显著低于其他两组(P<0.01)。试验1组和试验2组母羊血清中白蛋白(ALB)含量显著低于对照组(P<0.05),尿素氮(BUN)含量极显著低于对照组(P<0.01),试验2组母羊血清中谷丙转氨酶(ALT)活性显著高于其他组(P<0.05)。试验1组和试验2组母羊瘤胃氨态氮含量极显著低于对照组(P<0.01)。试验1组与试验2组母羊瘤胃拟杆菌门、疣微菌门和理研菌属相对丰度极显著高于对照组(P<0.01),丹毒丝菌属UCG-002相对丰度极显著低于对照组(P<0.01),厚壁菌门和普雷沃氏菌属相对丰度显著低于对照组(P<0.05);试验1组母羊瘤胃拟杆菌属极显著低于其他两组(P<0.01)。研究表明,适当降低日粮能量水平,可在保证妊娠母羊正常生命活动的同时降低冬春季舍饲的饲养成本,提高养殖效益;过度地降低日粮能量水平会对妊娠母羊产生负面影响。
The experiment was to explore the effect of different energy level diets on growth performance,serum biochemical index,rumen fermentation parameters and rumen microflora of Gobi Short-tail pregnant ewe.Sixty healthy Gobi Short-tail pregnant ewes with similar age,body condition and weight(43.64±2.19)kg were selected and randomly divided into three groups,with four replicates in each group and five ewes in each replicate.Ewes in each group were fed diets with different energy levels.The metabolic energy of control group was 7.98 MJ/kg.Metabolic energy of test group 1 was 6.37 MJ/kg.The metabolic energy of test group 2 was 4.77 MJ/kg.The pre trial period was 15 d,and the trial period was 45 d.The results showed that the final weight and average daily gain of ewes in test group 2 were extremely lower than those in other two groups(P<0.01).The serum ALB content of ewes in test group 1 and test group 2 was significantly lower than that in control group(P<0.05),the serum BUN content was extremely lower than that in control group(P<0.01),and ALT activity of ewes in test group 2 was significantly higher than that in other groups(P<0.05).The rumen ammonia nitrogen content of ewes in test group 1 and test group 2 was extremely lower than that in control group(P<0.01).The relative abundances of Bacteroides,Verrucomicrobiota and Rikenellaceae in rumen of test group 1 and test group 2 were extremely higher than those in control group(P<0.01),the relative abundances of Erysipelotrichaceae UCG-002 were extremely lower than those in control group(P<0.01),and the relative abundances of Firmicutes and Prevotella were significantly lower than those in control group(P<0.05).Rumen Bacteroides of ewes in test group 1 were extremely lower than those in other two groups(P<0.01).The study indicates tthiat proper reduction of dietary energy level can ensure the normal life activities of pregnant ewes,reduce the feeding cost of shed feeding in winter and spring,improve the breeding efficiency of farmers and herdsmen,excessive reduction of dietary energy level will have a negative impact on pregnant ewes to some extent.
作者
杨磊
赵启南
李长青
郭天龙
刘云龙
王利
张海鹰
王超
YANG Lei;ZHAO Qi-nan;LI Chang-qing;GUO Tian-long;LIU Yun-long;WANG Li;ZHANG Hai-ying;WANG Chao
出处
《饲料研究》
CAS
北大核心
2023年第14期5-10,共6页
Feed Research
基金
内蒙古自治区科技重大专项(项目编号:2020ZD0003)
国家肉羊产业技术体系(项目编号:cars38)。
