成都麻羊生态特征的研究

成都麻羊的生态特征和其生态条件紧密联系。麻羊产区,在海拔升高、生态条件改变的情况下,麻羊的某些生态特征亦发生相应的变化。如汶川县麻羊的体重、体高、体长、胸围、管围、胸深、胸宽等指标都高于大邑县麻羊,红血球、白血球、血红蛋白和血清钾的量亦较大邑县麻羊为高;汶川县麻羊被毛深厚,粗毛较稀,皮肤变厚,气管粗而长,环状软骨两端问距离大,心脏发育良好;汶川麻羊的消化系统除小肠外,均较大邑麻羊发达;甲状腺和肾上腺发育亦好。此外,成都麻羊的耐热性较差,汗腺属“顶浆分泌型”,但不能排汗。

A PRELIMINARY STUDY ON ECOLOGICAL CHARACTERISTICS IN THE MA GOAT

The ecological characteristics of goat are closely related to ecological conditions. These characteristics vary with the altitude and ecological conditions.For example,the Ma goats in high-altitude Wenchuan county have bigger body weight, withers height, body length,chest girth,shin circumference,chest depth and chest width than those in low-altitude Dayi cunty.There are more red blood cells,white blood cells,hemoglobin and blood serum kalium in the former.Besides,in Menchuan,goat hair coat and skin are thick,trachas coarse and long,the cricoid cartilage distances between the two ends long,heart and digestive tract with the exception of small intestrne well developed, and both of the thyroid and adrenal grow fine.The Ma goats shows a poor heat-resistance. Its sweat gland is apocrine-typed,but not perspiratory.