【摘要】 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月和９月，分别对放牧率为４羊／ｈｍ２的围栏放牧草场上绵羊采食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食顺序，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调控和再分配的作用。同时，单位面积内采食时间和１００ｍ２内单位次数采食时间，这两个指标对草场的植物种类组成较为敏感，可以用来较好地反映绵羊采食行为特征与草场空间异质性间的关系更多还原

【Abstract】 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.更多还原