GIS支持下的区域绿色蔬菜地适宜性及其质量评价--以厦门市同安区为例

在实地调查采样和测试分析基础上,利用主成分和相关分析模型筛选建立区域绿色蔬菜地适宜性评价主导因子体系,借助GIS和动态聚类分析模型评价区域耕地绿色蔬菜生产的适宜数量、质量及其分布。评价结果表明,坡度、质地、耕层厚度、灌溉条件和环境污染综合指数等20个因子可作为区域绿色蔬菜地适宜性评价的主导因子。同安区适宜发展绿色蔬菜生产的耕地面积6403.98hm2,占基本农田保护区耕地总面积的66.44%,主要分布于莲花、五显、汀溪和新民镇,合计占全区绿色蔬菜地总面积的80.24%,全区绿色蔬菜地的总体质量不高,中度和一般适宜的二、三等地面积合计占全区绿色蔬菜地总面积的70.01%。

The Evaluation on Suitability and Quality to Green Vegetable Production Fields in Tongan District

The suitability and quality to green vegetable production fields in Tongan district was evaluated by GIS on the basis of field investigation. The results showed that 20 factors, including slope, texture, thickness of plowed layer, irrigation and pollution index, can be used as the major factors for evaluating the suitability of the fields to green vegetable production. There are 6403.98 hm2 of fields that can be served as green vegetable production, making up 66.44% of the fundamental cropped fields protected by the government in the district. About 80.24% of the fields which are suitable to green vegetable production are distributed over the towns of Lianhua, Wuxian, Dingxi and Xinming. Most of green vegetable fields are in middle quality.