妊娠后期饲粮营养水平对母羊和胚胎发育的影响

发布时间：2018-02-09 18:10

本文关键词： 妊娠母羊营养水平日粮组成精粗比妊娠后期湖羊胚胎　出处：《畜牧兽医学报》2017年03期 　论文类型：期刊论文

【摘要】：本试验旨在研究妊娠后期饲粮营养水平对母羊及胚胎发育的影响。试验选用健康、怀双羔的初产湖羊,妊娠0~90d采用相同的TMR,自由采食。妊娠90d时母羊(平均体重(44.45±2.2)kg)分3个处理组饲喂,每组11个重复,每个重复2只,共计66只。试验采用相同的精料补充料和粗料,分别按照以干物质为基础,精∶粗为5∶5、4∶6、3∶7定量饲喂母羊至妊娠140d,每组选取3只进行屠宰试验。结果表明,随着营养水平降低:1)母羊体重有降低趋势(P0.10),对母羊腹围无显著性影响(P0.05),但可显著影响到母羊的体增重(P0.05);2)母羊的妊娠产物总重、羊水重及胚胎重无显著变化(P0.05),但胚胎重量有降低趋势(P0.10);3)除心重外(P0.05),胚胎的体尺及内脏器官的发育无显著变化(P0.05),但随营养水平降低,胚胎体高、体斜长、肝、肺、胃、小肠重量有降低趋势(P0.10)。通过精∶粗调控妊娠后期母羊饲粮营养水平可显著影响到母羊的体增重;但在没超出母体的耐受范围的情况下,母羊以降低自身的体增重最大限度维持母羊的妊娠产物、胚胎的体尺、组织器官的发育,但仍会影响胚胎的正常发育。
[Abstract]:The purpose of this experiment was to study the effect of dietary nutrition level on ewe and embryo development in late pregnancy. On the 90th day of gestation, ewe (average body weight 44.45 卤2.2 kg) were fed with the same TMRs on the 90th day of gestation. The ewe were divided into 3 treatment groups, 11 replicates in each group, 2 replicates in each group, a total of 66. The same concentrate supplement and crude feed were used in the experiment. On the basis of dry matter, three sheep were selected for slaughter test in each group, which were fed with 5: 5: 4: 6: 6: 7 to 140 days of gestation, respectively. There was a tendency to decrease the weight of ewe (P _ (0.10)), but there was no significant effect on the abdominal circumference of ewe (P _ (0.05)), but it could significantly affect the total weight of pregnancy product of ewe (P _ (0.05) ~ (2)). There was no significant change in amniotic fluid weight and embryo weight, but there was a decreasing trend in embryo weight (P 0.10). Except for heart weight, there was no significant change in body size and visceral organ development. However, with the decrease of nutritional level, the body height, oblique length, liver, lung and stomach of the embryo were not significantly changed. The weight of small intestine has a tendency to decrease P0.100.The diet nutrition level of ewe can significantly affect the body weight gain of ewe through fine: crude regulation, but without exceeding the tolerance range of maternal body, In order to reduce their body weight gain, ewe can maintain the pregnancy product, embryo size, tissue and organ development, but still affect the normal development of embryo.
【作者单位】：中国农业科学院饲料研究所农业部饲料生物技术重点实验室;
【基金】：国家肉羊产业技术体系建设专项资金(CARS-39) 南方地区幼龄草食畜禽饲养技术研究(201303143)
【分类号】：S826.5

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