呼伦贝尔短尾羊产前补饲精喂对家畜个体特征及生产效益的影响

发布时间：2018-01-29 10:41

本文关键词： 呼伦贝尔短尾羊补饲体尺体重经济效益　出处：《草业学报》2017年07期 　论文类型：期刊论文

【摘要】：在内蒙古草原牧区,冬季对绵羊补饲精喂的研究具有重要的意义。为研究产羔前对母畜舍饲精料后,呼伦贝尔短尾羊体重、体尺及经济效益的变化,本研究选取60对待产的呼伦贝尔短尾母绵羊作为试验对象,在母畜产羔前一个月,试验组母畜舍饲精料,对照组仅补饲干草,分析100日龄内家畜体重、体尺及经济效益变化。利用方差及偏最小二乘回归法,分析产前补饲对家畜个体、生产效益的影响及影响家畜体重的主要体尺权重,结果显示,100d时间段内,母畜体重呈先减少后增加的趋势;仔畜出生后一个月左右的时间段,试验组仔畜的胸围、胸宽、体高、胸深、体长和体斜长显著高于对照组(P0.05)。影响呼伦贝尔短尾羊体重的主要体尺指标为:胸围、胸宽、体高和胸深,影响权重达到50%以上。补饲使得仔畜的成活率、出售价格显著高于未进行补饲的对照组(P0.05)。通过补饲母畜不仅可以影响仔畜体重和体尺指标,而且对提高仔畜成活率和经济效益具有重要的作用,这为今后后备母羊的选育、家畜的精准淘汰提供了理论基础。
[Abstract]:In Inner Mongolia grassland pastoral area, it is of great significance to study the supplement feeding of sheep in winter. In order to study the changes of weight, body size and economic benefit of Hulunbeir short tail sheep after feeding concentrate to female animals before lambing. In this study, 60 hulunbeier short-tailed ewes were selected as experimental objects. One month before lambing, the experimental group was fed with concentrate, while the control group was only supplemented with hay, and the body weight of domestic animals was analyzed within 100 days of age. The variance and partial least square regression method were used to analyze the effect of prenatal supplementary feeding on individual livestock, the production benefit and the weight of the main body size which affected the body weight of livestock. Within 100 days, the weight of female animals decreased first and then increased. About one month after birth, the chest circumference, chest width, body height and chest depth of the young animals in the test group. The body length and oblique length were significantly higher than that of the control group (P 0.05). The main body size indexes affecting the weight of Hulunbeir short-tailed sheep were chest circumference, chest width, body height and chest depth. The weight of influence reached more than 50%. The survival rate of young animals was significantly higher than that of the control group without supplementary feeding (P0.05). The body weight and body size index could not only be affected by supplemental feeding of female animals. Moreover, it plays an important role in improving the survival rate and economic benefit of litter animals, which provides a theoretical basis for the breeding of back-up ewes and the accurate elimination of domestic animals in the future.
【作者单位】：内蒙古农业大学草原与资源环境学院;鄂温克族自治旗草原工作站;
【基金】：国家自然科学基金(31260123,3260124,31270502) 科技部支撑项目(2012BAD13B02)资助
【分类号】：S826.5
【正文快照】： 家畜的生产繁殖在整个生长周期内呈规律性波动。家畜对于能量的需求在冬季、产羔时期、疾病等情况出现时显著增加。因此,为了保障家畜能量供需的相对平衡,对家畜,尤其是母畜进行补饲精料,不仅可以提高家畜的个体生产性能,而且可以促进母畜的繁殖率及仔畜的成活率。此外,补饲在

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