张勇 李明 曲久 保吉财 张品林 喇振兴 桑旦欧珠 珠姆

摘要：色瓦绵羊在藏北绵羊品种中因体格健壮、产奶量高、屠宰率较高、抗逆性强等特点属高寒牧区饲养的优质绵羊品种。研究针对班戈色瓦绵羊优势畜种特有性能，实施不同年龄段短期育肥，研究色瓦绵羊最佳育肥年龄。结果显示，经过为期60 d的全舍饲短期育肥，各年龄段绵羊平均增重14.77 kg，其中2岁畜龄绵羊育肥效果高于其他畜龄绵羊，比1岁畜龄绵羊多增重4 kg、比3岁畜龄绵羊多增重4.5 kg、比4岁畜龄绵羊多增重2.83 kg、比5歲畜龄绵羊多增重4.25 kg、比6岁畜龄绵羊多增重3.75 kg。

关键词：班戈色瓦绵羊;不同年龄段;短期育肥

中图分类号：S858.26文献标识码：Bdoi：10.3969/j.issn.2096-3637.2021.22.002

Study on Short-term Fattening Effect of Bangor Wa Sheep at Different Ages

ZHANG Yong，LI Ming，QU Jiu，BAO Jicai，ZHANG Pinlin，

LA Zhenxing，SANGDAN Ouzhu，ZHU Mu

（Nagqu Animal Husbandry and Veterinary Technology Promotion Station，Nagqu Tibet 852000，China）

Abstract：Seva sheep is a high-quality sheep breed raised in high-cold pastoral area because of its strong physique，high milk yield，high slaughter rate and strong resistance. In this paper，short-term fattening at different ages was carried out to study the best fattening age of the Bangor Sewa Sheep. The results showed that after 60 days of short-term fattening，the average weight gain of each age group was 14.77 kg，and the fattening effect of 2-year-old sheep was higher than that of other age group，4 kg more than one year old sheep，4.5 kg more than three year old sheep，2.83 kg more than four year old sheep，4.25 kg more than five year old sheep，3.75 kg more than six year old sheep.

Keywords：bangorsewa sheep，different ages，short-term fattening

0引言

根据自治区相关科研部门及专家认定，班戈色瓦绵羊系藏北独有的一种生活在海拔4 800 m以上的高原绵羊类群，具备生长发育快、体格健壮、耐粗饲、产奶量高、抗病力强和抗逆性强等特点，长期受高寒、高海拔环境影响而形成的地方独特品种[1]。其养殖核心区山势平缓，地形开阔，地势北高南低⑵。每到春季，大风连续不断，秋季到春季，常出现雪灾。其特殊地理位置和生态环境为生长在高海拔山区的班戈色瓦绵羊提供了适宜的生活环境。

色瓦绵羊体格健壮，体质结实，头中等，额稍宽，鼻梁微隆起。公羊大多有角，少数无角。母羊胸宽深，肋骨开张良好，胸深接近体高的1/2，背腰宽平，后躯发育良好。肌肉丰满，结构均称，四肢粗壮，毛色以纯白色居多，约占60%，全身黑色约占10%，体躯花杂色约占20%，黑头羊占10%。……