用模糊综合评判法研究桔小寡鬃实蝇在四川的适生分布

A STUDY ON POTENTIAL DISTRIBUTION OF Dacus Dorsalis IN SICHUAN WITH COMPREHENSIVE JUDGEMENT OF FUZZY MATHEMATICS

依据桔小寡鬃实蝇(Dacus dorsalis Hendel)的生物学、生态学特性,选择7项生态因子,以四川25个站点,30年的气象资料(1961～1990),用模糊综合评判法研究了该虫在四川省的适生分布范围.结果表明,攀西地区及筠连、珙县、叙永、古蔺县等的部分地区为最适分布区,其分布北界为北纬28°;龙泉山脉以东和以南的广大盆地区域是适宜分布区,其分布北界是北纬31°左右;盆地与盆周山地的过渡区域是次适生分布区.盆周东部和山地及川西高原是非适生分布区.

The comprenbenaive judgement was conducted for 25 sites in Sichuan and seven climatic elements which affect the growth of Dacws dorsalis, using 30 years' (i. e. 1961- 1990)data as the analytical materials. To make the effective judgement of various sites,the fuzzy mathematics analytical methods were used. The results showed that the Panxi region and the partial region including Junlian, Gongxian, Xuyong and Guling counties were the moat suitable areas forZ D. dorsalis, the northern boundary was 28 N; the Sichuan Basin of east at Longquan Mountains cuold be suitable aeras,including Leshan ,yibing ,Luzhou ,NeiJiang ,Xuning;nan-chong,Chongqing ,Fuling and Wanxian districts, the northern boundary was 31 N and the partial region of Ya'an,Chengdu,Mianyang and Bazhong ere inforier suitable areas.