石渠县高原鼠兔宜生区划分初探

First Exploration of Ochotona Curzoniae Inhabitable Area Segmenting in Shiqu County

通过分析区域内草原植被与生态环境状况,划分出草原鼠害的适生范围,是草原鼠害监测的新方法。本文以石渠县高原鼠兔为例,结合地面调查数据和3S技术,通过对草原类型、海拔高度、坡度、坡向、植被指数等5个影响因子与高原鼠兔分布的相关性分析,计算出石渠县高原鼠兔宜生指数、宜生区分布及其分布图。结果显示:宜生区与实际发生区基本吻合,草原技术推广部门勾绘的高原鼠兔分布区与宜生区重叠率57. 9%;经计算,石渠县高原鼠兔宜生区面积1041885. 0hm^2,比统计面积少17. 1%;本文提供了一种可以通过计算获取高原鼠兔分布区域和面积的方法,可用于草原鼠害的监测工作中。

By analysis of regional grassland vegetation and the ecological environment condition,grassland rodent suitable range were divided. It was a new method of grassland rodent monitoring. Taking Shiqu County ochotona curzoniae as an example,combining with the ground sampling and 3 S technology,Vegetation types,altitude,slope,aspect,vegetation index etc. 5 affecting factors’ correlation with ochotona curzoniae was analyzed. Then inhabitable index and inhabitable area were calculated and distribution map was worked out. The results showed that inhabitable ranges ware consistent with the actual occurrence of ochotona curzoniae,and its had 57. 9% overlap range with the map provided by Technical Extension Department. The result of ochotona curzoniae Inhabitable area of whole Shiqu county were1041885 hm^2,It was 17. 1% less than the statistical area. This paper provided a calculating method of distribution range and area of ochotona curzoniae. The method could be used for monitoring the grassland rodent.