放牧补饲条件下云南黑山羊生长发育规律研究

Growth and Development of Yunnan Black Goat Raising under Grazing plus Supplementary Feeding Mode

为了探讨云南黑山羊的生长发育规律,对放牧加补饲条件下云南黑山羊的体重、体尺进行测定,对所测定数据进行分析。结果表明:云南黑山羊体重增重规律与其他肉羊增重规律相似,体尺累积生长平缓上升,同时云南黑山羊具有早期生长发育快的特点,公羊、母羊体重从出生到3月龄时达到绝对生长高峰,日增重分别达到201.11g和162.44g;绝对生长曲线总体呈下降趋势,提示应加强羔羊断奶后的饲养管理。云南黑山羊生长发育阶段体重和体尺的相关性与性别有关,公羊10月龄体重、体尺的相关性高于3月龄;母羊相反,同时,母羊3月龄体重与体尺的相关性均为正相关(P<0.01);3月龄公、母羊胸围与体重的具有较高的相关性,相关系数分别为0.85和0.75。

In order to investigate the rule of growth and development of Yunnan black goat under the raising patterns of grazing plus supplementary feeding,the data of the body weight and size were measured and analyzed.The result showed that the weight gain regulation of Yunnan black goat was similar to other mutton sheep and the body size increased gently.Secondly,Yunnan black goat has the characteristics of faster early growth.The body weight of both male and female goats reached their absolute growth peak values during the period ranging from birth to 3months.The daily weight gains were 201.11 g and 162.44 g respectively.The absolute growth curve displayed generally downward trend,the result suggested that we should strengthen the feeding and management of weaning lamb.Finally,the correlation between the body weight and size may link the gender of goat.The correlation between body weight and size of ram 10-month old was higher than 3-month old,but ewe was opposite.At the same time,the correlation between body weight and size of ewe 3-month old was positive correlation（P〈0.01）,the correlation between chest girth and body weight had high correlation,the correlation coefficient of ram was 0.85 and ewe was 0.75 at 3-month old.