摘要
2 0 0 2年 7-1 1月 ,在内蒙古畜牧科学院四子王旗试验站 ,对短花针茅Stipabreviflora荒漠草原不同载畜率条件下的蒙古细毛羊的选择性采食进行了观察研究。结果表明 :绵羊对适口性好的牧草有很强的选择性采食能力 ,其食谱主要由几种适口性好的牧草组成 ;绵羊的选择性采食有明显的季节变化 ,8月对银灰旋花Convolvulusammannii的嗜食性指数高于其他牧草 ,9月对栉叶蒿Artemisiapectinata的嗜食性指数有所增大 ;同一季绵羊食谱各放牧处理间无显著差异 ,但随着放牧时间的延续和气温的下降 。
The experiment was conducted in Stipa breviflora desert steppe in Siziwang Banner of Inner Mongolia from July to November in 2002. Six different stocking rates and non-grazed plot (control plot) (CK) were set up with sheep in order to study selective intake behavior in response to stocking rates. The main results were as follows:(1) The local sheep displayed a high selection rate to a limited number of plant species. (2) Sheep had a higher preference to Convolvulus ammannii than any other plant species in Aug, but the preference ratio to Artemisia pectinata frigid increased at the end of the experiment, especially with higher stocking rates. (4) The composition of diet showed no differences among the stocking rates in the same season, but the number of plant species available declined with the seasonal change.
出处
《草业科学》
CAS
CSCD
2004年第12期95-98,共4页
Pratacultural Science
基金
国家自然科学基金 ( 30 0 6 0 0 5 6
30 36 0 0 2 2 )
教育部青年教师教学科研奖励计划项目
关键词
载畜率
选择性采食
食谱
stoking rate
selective intake
diet
