冬季放牧期苏尼特成年母羊与后备母羊的采食量和营养物质表观消化率的测定  

Feed intake and nutrient apparent digestibility on Sunite adult ewes and reserved ewes during winter grazing

作　　者：李丽 赵艳丽[1] 刘树林 李胤豪 王彦婷 郭晓宇[1] 李军 闫素梅[1] LI Li;ZHAO Yan-li;LIU Shu-lin;LI Yin-hao;WANG Yan-ting;GUO Xiao-yu;LI Jun;YAN Su-mei

机构地区：[1]内蒙古农业大学动物科学学院,内蒙古高校动物营养与饲料科学重点实验室,内蒙古呼和浩特010018 [2]内蒙古大学生命科学学院,内蒙古呼和浩特010070 [3]苏尼特右旗荣宇现代生态畜牧有限公司,内蒙古锡林郭勒011200

出　　处：《饲料研究》2020年第10期1-4,共4页Feed Research

基　　金：国家重点研发计划课题(项目编号:2018YFD0502100)。

摘　　要：试验测定冬季放牧期天然牧草的营养物质含量、苏尼特羊的采食量及其对营养物质的消化率,为天然放牧条件下成年和后备母羊补饲方案的优化提供参考。采用单因素完全随机试验设计,将后备母羊(RE)和成年母羊(AE)分为2组,每组50只羊。结果表明:冬季天然牧草粗蛋白(CP)、锌(Zn)、铜(Cu)、硒(Se)含量较低,铁(Fe)含量较高;RE组和AE组的母羊干物质采食量(DMI)分别为66、49 g/kgW^0.75。AE组的干物质(DM)、钾(K)、镁(Mg)、铬(Cr)、锰(Mn)及Zn的消化率显著高于RE组(P<0.05),两组对其他营养物质消化率无显著影响(P>0.05)。综上所述,冬季放牧期天然牧草营养价值低,母羊的DMI不能满足其营养需求,需要补充CP、Zn、Cu和Se;不同阶段母羊对营养物质的消化率存在差异,因此需对其制定针对性的补饲方案。In the paper,the nutrient content of natural herbage,the feed intake of Sunite sheep and the apparent digestibility of nutrients in winter grazing period were measured,which provided reference for optimization of supplementary feeding scheme for adult and reserved ewes under natural grazing conditions.Reserved ewes(RE)and adult ewes(AE)were divided into two groups with 50 sheep in each group.Feed intake and nutrient apparent digestibility were determined by total fecal harvesting method and combined indicator method.The results showed that the contents of CP,Zn,Cu and Se were lower and the content of Fe was higher.The dry matter intake(DMI)of RE group and AE group were 66,49 g/kg of metabolic weight respectively.The nutrient digestibilities of DM,K,Mg,Cr,Mn and Zn of AE group were significantly higher than that of RE group(P<0.05).The two groups had no significant effect on the digestibility of and other nutrients(P>0.05).It can be seen that the nutritional value of natural herbage in winter grazing period was low,and the DMI of ewes couldn’t meet the nutritional requirements for ewes,need to supplement CP,Zn,Cu and Se.Ewes at different stages have different digestibility of nutrients,so it is necessary to make specific supplementary feeding schemes for ewes.

关 键 词：苏尼特羊 自然放牧 采食量 营养物质表观消化率 

分 类 号：S826[农业科学—畜牧学]