内蒙古绒山羊长绒后期褪黑激素埋植时间对其生产性能的影响

发布时间：2018-12-15 20:41

【摘要】：为研究内蒙古绒山羊长绒后期褪黑激素埋植时间对绒山羊产绒性能、生长性能和繁殖性能的影响,于2013年4月底抓绒时选用体重相近、产绒量基本一致的3周岁左右的内蒙古绒山羊30只,随机分成3组,分别为对照组、2013年12月和2014年2月2次埋植组(即12月底开始2次埋植组)以及2014年2月单次埋植组(即2月底单次埋植组),埋植褪黑激素剂量为2mg/kg(BW)。埋植开始至试验结束(2014年4月底抓绒)逐月观察山羊绒生长情况,并采集绒样,用于分析埋植对山羊绒生长的影响。称量试验羊的初始和结束体重,并统计产羔数和羔羊初生重。结果表明:1)单次埋植褪黑激素组在4月底抓绒时绝大多数羊颈部存在明显的脱绒损失,而对照组和2次埋植组并未出现脱绒现象;2)埋植褪黑激素对试验结束时羊体重和日增重没有影响(P0.05),对产羔数和羔羊的初生重也无影响(P0.05);3)各组间羊绒长度和细度无差异(P0.05),2次埋植组羊绒产量与对照组没有差异(P0.05),而单次埋植组羊绒产量因提前脱落损失而显著降低(P0.05);4)1—3月份山羊绒生长速率逐渐降低,各组间没有差异(P0.05),且均在4月份停止生长。因此,2月底单次埋植褪黑激素有促使山羊绒提前脱落的作用,12月底开始2次埋植褪黑激素虽没有促使山羊绒提前脱落,但也没有促进山羊绒生长,并未延长山羊绒生长期。
[Abstract]:In order to study the effect of melatonin implantation time on cashmere yield, growth and reproduction of Inner Mongolia Cashmere Goat, the weight was similar at the end of April 2013. Thirty Inner Mongolia Cashmere Goats, about 3 years old with the same cashmere yield, were randomly divided into 3 groups, respectively, as the control group. In December 2013 and February 2014, the second implant group (i.e., the second implantation group started at the end of December 12) and the single implant group in February 2014 (i.e., the single implant group at the end of February 2014) were implanted with melatonin at the dose of 2mg/kg (BW). The growth of cashmere was observed month by month from the beginning of implantation to the end of experiment (late April 2014), and the cashmere samples were collected to analyze the influence of planting on the growth of cashmere. The initial and end weight of the sheep was measured, and the lambs and the birth weight of the lambs were counted. The results were as follows: 1) in the single implant melatonin group, there was a significant loss of develvet in the neck of most sheep at the end of April, but there was no develvet in the control group and the second implantation group; 2) embedding melatonin had no effect on body weight and daily gain of sheep at the end of the experiment (P0.05), and had no effect on lambs and birth weight of lambs (P0.05). 3) there was no difference in the length and fineness of cashmere between the groups (P0.05), but there was no difference in cashmere yield between the second implantation group and the control group (P0.05), but the cashmere yield in the single implantation group decreased significantly because of early shedding loss (P0.05). 4) the growth rate of cashmere decreased gradually in January and January, and there was no difference among the groups (P0.05), and all of them stopped growing in April. Therefore, the single implantation of melatonin at the end of February had the effect of promoting the cashmere to fall off early, and the second implantation of melatonin at the end of December did not promote the cashmere to fall off, but did not promote the growth of cashmere, and did not prolong the growth period of cashmere.
【作者单位】：中国农业大学动物科学技术学院;内蒙古亿维白绒山羊有限责任公司;
【基金】：国家自然科学基金项目(31470119) 中央高校基本科研业务费专项资金资助(2015QC083)
【分类号】：S827

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