基于GIS的浙江仙居杨梅种植潜力分析

GIS-Based Potential Analysis for Myrica rubra Cultivation In Xianju County,Zhejiang Province

近年来,仙居杨梅产业飞速发展,生态经济效益显著提高。本文以浙江省仙居县为研究区域,根据杨梅生长对气候、土壤等环境的要求,采用"特尔斐法"(Delphi)选取一定的评价因子,应用"层次分析法"(AHP)确定影响因子权重,运用"加权指数求和法"和GIS综合评价土地适宜性,并将适宜性评价结果和杨梅种植现状进行对比,分析仙居杨梅种植潜力。结果表明:仙居县具有很大的杨梅种植潜力,最适宜地和适宜地共96193.28 hm2,占评价区域面积的59.83%。现有杨梅种植地的57.72%(约2006.4hm2)分布在适宜地中,而只有19.62%(约681.88 hm2)分布在最适宜地中,占最适宜地的9.25%。应尽可能地利用最适宜地,以期发挥杨梅更大的生态经济效益。

In recent years ,with the rapid development of Myrica rubra industry,ecological and economic benefits have been significantly increased. In this study,Delphi and Analytical Hierarchy Process （AHP） were applied to determine evaluation factors and the weight of each factor according to the growth requirement of Myrica rubra,and Index Accumulation Method （IAM） and GIS were adopted to evaluate the land suitability for Myrica rubra in Xianju County. On the basis of the result of suitability evaluation, potential analysis for cultivation was conducted. The results showed that there had a high cultivation potential. Highly suitable and suitable areas were 96193.28 hm^2 together which occupied 59.83% of the evaluation areas. About 19.62% （approximately 681.88 hm^2） and 57.72% （about 2006.4 hm^2） of the present cultivation areas distributed in the highly suitable and suitable areas respectively,and the former only accounted for 9.25% of the highly suitable areas. The highly suitable areas should be exploited to get more ecological and economic benefits.