绵羊的采食行为与草场空间异质性关系

在中国科学院内蒙古草原生态系统定位研究站，于１９９３年６月，７月９月，分别对放牧率为４羊／ｈｍ＾２的围栏放牧草场上绵羊采集行为与草场空间异质性的关系进行了定量研究，结果表明，绵羊的采食运动模式与草场空间异质性密切相关，采食区域和卧息及反刍地点相对稳定，对草场的利用依植物群落种类组成的变化有不同的采集顺序，一般地，多选择大针茅，寸草苔，星毛萎陵菜较少的平地上采食，饮水点对采食路线和目标的选择有一定的

RELATIONSHIP BETWEEN FORAGING AREAS OF SHEEP(WETHER) AND SPATIAL HETEROGENEITY OF GRASSLAND LANDSCAPE

The research of relationship between foraging areas of sheep and spatial heterogeneity of grassland landscape was conducted at the blocks of a fenced grazing grassland with stocking rate of 4 sheep/hm 2.The results show that the patterns of sheep foraging are relatively regular in foraging lines and spots of lying.Generally,the grazing sheep prefer to forage the communities consisted mainly of Amtemisia frigida and Cleistogenes squarrosa rather than to forage the communities consisted of Stipa grandis and Potenllia acaulis .Meanwhile,the ingestion time per unit area and per foraging times in unit area are sensitive to the community types,therefore,they can be better to describe the relation between foraging behaviors of grazing sheep and the spatial heterogeneity of grassland landscaps.