滩羊空怀期能量需要量研究  

Energy Requirements of Tan Sheep during Non-Pregnancy Period

作　　者：马佳音 罗迪克 何喜梦 梁旭辉 寇启芳 牛文智 杨雨鑫[1] MA Jiayin;LUO Dike;HE Ximeng;LIANG Xuhui;KOU Qifang;NIU Wenzhi;YANG Yuxin(College of Animal Science and Technology,Northwest A&F University,Yangling 712100,China;Wuzhong Animal Disease Control and Prevention Center,Wuzhong 751100,China;Wuzhong Hongsipu District Tianyuan Well-Bred Sheep Breeding Co.,Ltd.,Wuzhong 751900,China)

机构地区：[1]西北农林科技大学动物科技学院,杨凌712100 [2]吴忠市动物疾病预防控制中心,吴忠751100 [3]吴忠市红寺堡区天源良种羊繁育养殖有限公司,吴忠751900

出　　处：《动物营养学报》2024年第9期5828-5836,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：宁夏回族自治区重点研发计划项目(2021BBF02034);国家绒毛用羊产业技术体系(CARS-39-12)。

摘　　要：本试验旨在研究滩羊空怀期能量代谢规律和需要量,为建设科学饲喂体系提供理论基础。选取48只体重[(33.79±1.33)kg]接近、体况良好的空怀期滩羊,随机分为4组,每组4个重复,每个重复3只羊。4组试验羊分别饲喂消化能为6.69(Ⅰ组)、7.29(Ⅱ组)、7.97(Ⅲ组)和8.82 MJ/kg(Ⅳ组)的饲粮。预试期7 d,正试期30 d。结果表明:1)滩羊平均日增重(ADG)随饲粮能量水平的提高而提高,其中Ⅳ组ADG极显著高于其他各组(P<0.01),Ⅲ组ADG极显著高于Ⅰ组(P<0.01),Ⅱ组ADG显著高于Ⅰ组(P<0.05);Ⅰ组干物质采食量(DMI)显著高于Ⅲ组(P<0.05),其他各组间DMI差异不显著(P>0.05)。2)滩羊消化能和代谢能摄入量随饲粮能量水平的提高而提高,其中Ⅳ组消化能摄入量极显著高于Ⅰ组和Ⅱ组(P<0.01),显著高于Ⅲ组(P<0.05);Ⅳ组代谢能摄入量极显著高于其他3组(P<0.01),Ⅲ组代谢能摄入量显著高于Ⅰ组(P<0.05)。3)空怀期滩羊对饲粮的总能消化率和总能代谢率分别为52.42%~59.85%和43.14%~51.36%。4)滩羊空怀期消化能和代谢能需要量与代谢体重(W 0.75)和ADG的回归方程分别为:消化能需要量(MJ/d)=0.5272W^(0.75)+0.040ADG(R^(2)=0.897,P<0.01);代谢能需要量(MJ/d)=0.4016W^(0.75)+0.040ADG(R^(2)=0.942,P<0.01)。通过回归模型得出,滩羊空怀期代谢能维持需要量为401.6 kJ/kg W^(0.75),每100 g日增重需要代谢能400.0 kJ。This experiment was conducted to study the energy metabolism rule and requirements of Tan sheep during non-pregnancy period,and to provide a theoretical basis for the construction of scientific feeding system.A total of 48 Tan sheep with similar body weight of(33.79±1.33)kg and good body condition during non-pregnancy period were randomly divided into 4 groups with 4 replicates per group and 3 sheep per replicate.Sheep in the four groups were fed diets with digestible energy of 6.69(groupⅠ),7.29(groupⅡ),7.97(groupⅢ)and 8.82 MJ/kg(groupⅣ),respectively.The pre-trial period lasted for 7 days and the experimental period lasted for 30 days.The results showed as follows:1)the average daily gain(ADG)of Tan sheep was increased with dietary energy level increasing,and the ADG in groupⅣwas extremely significantly higher than that in the other groups(P<0.01),the ADG in groupⅢwas extremely significantly higher than that in groupⅠ(P<0.01),and the ADG in groupⅡwas significantly higher than that in groupⅠ(P<0.05).The dry matter intake(DMI)in groupⅠwas significantly higher than that in groupⅢ(P<0.05),but there was no significant difference in DMI among the other groups(P>0.05).2)The digestible energy intake and metabolizable energy intake of Tan sheep were increased with dietary energy level increasing,the digestible energy intake in groupⅣwas extremely significantly higher than that in groupsⅠandⅡ(P<0.01),and significantly higher than that in groupⅢ(P<0.05);the metabolizable energy intake in groupⅣwas extremely significantly higher than that in the other three groups(P<0.01),and the metabolizable energy intake in groupⅢwas significantly higher than that in groupⅠ(P<0.05).3)The gross energy digestibility and gross energy metabolic rate of Tan sheep during non-pregnancy period were 52.42%to 59.85%and 43.14%to 51.36%,respectively.4)The regression equations of digestible energy requirement and metabolizable energy requirement with metabolic body weight(W^(0.75))and ADG for Tan sheep during non-p

关 键 词：滩羊 空怀期 能量需要量 能量消化代谢 

分 类 号：S826[农业科学—畜牧学]