关键词: 土壤动物, 土壤动物, 生物指示, 土壤污染, 生态系统

Abstract: Based on per unit grain yield derived from 66 counties during 1978-2004 in Fujian province, relative meteorological yield was analyzed with the help of statistic means, and the risk degree of meteorological disaster on grain yield was showed by the variety of relative meteorological yield in this area. We choose three comprehensive risk assessment indices: average rate of yield reduction and variation coefficient of reduction rate in the poor harvest year, Cumulate probability of relative meteorological yield less than -5%. Through the above indices, the risk of meteorological disaster of per unit grain yield in Fujian Province was evaluated.The result indicated that the comprehensive risk index of each county in Fujian Province between 0.08~0.73, the high risk region mainly distributed Pingtan county, the mostly counties of Quanzhou and Zhangzhou , the west counties of Longyan and Sanming, the northeast region of Ninde and some counties of Nanping, the per unit grain yield of this area is mostly affected by some meteorological disasters, such as typhoon, rainstorm, drought, cold injury and so on. The low risk region mainly distributed in littoral counties of middle region and the interior region of Fujian province; the effect of meteorological disaster in this area is smaller than the high risk region.