GIS支持下的广东省水稻种植生态适宜性评价

利用GIS技术和层次分析法，对广东省水稻种植进行了生态适宜性评价。用特尔菲法和专家咨询法筛选各生态因子评价指标，从气候和地形条件两方面确定9个评价指标，建立了广东省水稻生态适宜性评价指标体系；将层次分析法运用于各指标权重的定量计算，采用地理信息系统软件ArcGIS9.3的叠加分析功能，得到广东省水稻种植生态适宜性评价图。结果表明，广东省南部沿海地区为双季稻最适宜种植区，占全省总面积的42.07%；粤中北内陆地区为双季稻次适宜种植区，占全省总面积的32.42%；粤北山区的大部分为双季稻的基本适宜种植区，占全省总面积的22.86%；粤西北边境山区为双季稻不适宜种植区，占全省总面积的2.65%。获得的评价结果与早期的广东省水稻区划结果基本吻合。

GIS-based ecological suitability evaluation for rice plantingin Guangdong province

Abstract: Based on the analytical hierarchy process (AHP) and GIS technology, ecological suitability region for rice planting was evaluated according to the present situation in Guangdong, China. The evaluation index system of ecological suitability for rice planting was established by selecting 9 indices from factors of climate and landform using Delphi and expert scoring method. Furthermore, the AHP method was used to determine the weights of the different indices quantitatively. Then, the map of ecological suitability for rice planting was generated in ArcGIS 9.3. The results showed that the highly suitable regions for double cropping rice planting are in the southern coastal areas, accounting for 42.07% of total rice planting area. The moderate suitable regions distribute in central and northern parts with a percentage of 32.42% from the total rice planting area. The general suitable regions are mostly distributed in northern mountains occupying 22.86% of the total. And unsuitable regions only locate at a small area of in the north with a percentage of 2.65% from the total planting areas. This paper indicated that the combination of AHP and GIS were a good approach for rice ecological suitability evaluation, and the results acquired from the research were basically coincide with the previous zoning fruits of rice planting in Guangdong.