全株玉米青贮对妊娠期疆岳驴体重、体尺及繁殖性能的影响

Effects of Whole-plant Corn Silage on Body Weight,Body Size and Reproductive Performance of Jiangyue Donkey During Pregnancy

试验旨在研究全株玉米青贮对妊娠驴期疆岳驴体重、体尺及繁殖性能的影响,选取妊娠期疆岳驴母驴(10月龄)30头,随机分为3组(每组10头),分别饲喂全株玉米青贮占日粮粗饲料比例为0(对照组)、25%(试验Ⅰ组)和50%(试验Ⅱ组)但能量和蛋白质水平相近的3种饲粮,试验期102 d,其中预试期12 d,正试期90 d。结果显示:随着饲喂时间的增加,各组妊娠驴体重、体高、体长、胸围和管围都呈增加趋势;体重与胸围极显著相关(P<0.01)。试验Ⅰ组和试验Ⅱ组繁殖率和产驹驴率均高于对照组,分别高30%和20%。驴驹初生重、管围和胸围各组间差异不显著(P>0.05);初生重和胸围试验Ⅰ组和试验Ⅱ组都略低于对照组;而体高试验Ⅰ组和试验Ⅱ组显著低于对照组(P<0.05);体长试验Ⅱ组极显著低于对照组(P<0.01)。结果表明:饲喂生产母驴可以用全株玉米青贮作为粗饲料来源,日粮中添加占粗饲料25%~50%的全株玉米青贮对生产母驴体重和体尺虽没有显著影响,但提高了繁殖性能;母驴妊娠后期饲粮中添加全株玉米青贮需考虑能量的补充。

The experiment was designed to study the effects of the whole-plant corn silage on body weight,body size and reproductive performance of Xinjiang donkeys during pregnancy.Total of 30 female donkeys(10 months old)during pregnancy were selected and randomly divided into three groups(10 in each group).They were fed with three kinds of diets with 0(control group),25%(experimental group Ⅰ)and 50%(experimental group Ⅱ)of the whole-plant corn silage in crude diet,but the energy and protein levels were similar.The experimental period was 102 days,of which the pre-experimental period was 12 days and the positive experimental period was 90 days.The results showed that with the increase of feeding time,the body weight,body height,body length,chest circumference and tube circumference of pregnant donkeys in each group showed an increasing trend.Weight was highly correlated with chest circumference(P<0.01).The reproduction rate and foaling rate of groups Ⅰ and Ⅱ were higher than those of the control group,which were 30% and 20% higher,respectively.There was no significant difference in birth weight,tube circumference and chest circumference among the groups(P>0.05).The birth weight and chest circumference of groups Ⅰ and Ⅱ were slightly lower than those of the control group;the body height of groups Ⅰ and Ⅱ was significantly lower than that of the control group(P<0.05).The body length of group Ⅱ was significantly lower than that of the control group(P<0.01).The results showed that the whole-plant corn silage could be used as the source of roughage for the production of donkeys.The addition of 25%-50% of the whole-plant corn silage in the diet had no significant effects on the body weights and body sizes of the production of donkeys,but improved the reproductive performance.The energy supplement should be considered,when the whole-plant corn silage was added to the diets of donkeys in the late pregnancy.