GIS支持下的区域蔬菜地适宜性评价

Suitability evaluation of regional vegetable field by GIS

借助GIS和数学模型集成技术,评价了荔城区蔬菜地适宜性及其质量状况。结果表明,荔城区宜菜地和不宜菜耕地分别占全区基本农田保护区耕地总面积的48.93％和51.07％,宜菜地主要分布于平原区的黄石和新度镇;一、二和三等宜菜地分别占全区宜菜地总面积的91.06％、7.09％和1.85％,表明荔城区宜菜地的总体质量较高;一等宜菜地主要分布于平原区的黄石、新度和拱辰镇;全区宜菜地土壤类型主要为灰埭田、灰泥田和乌埭田,占全区宜菜地总面积的92.42％。在蔬菜地适宜性及其质量评价的基础上,提出了区域蔬菜地合理利用与保护对策。

The suitability and quality of vegetable field in Licheng district were evaluated by integrated technologies of GIS and mathematic model. The results showed that the suited and unsuited areas for vegetable planting were 48. 93% and 51. 07% of the total areas of protective cropland in Licheng respectively. The fields suited for vegetable were mainly distributed in Huangshi and Xindu Town of plain area. The areas of the first, second and third grade fields suited for vegetable were 91.06%, 7.09% and 1.85% respectively, which indicated that the overall qualities of the fields suited for vegetable were much higher in Licheng. The first grade field suited for vegetable was districbuted in Huangshi, Xindu and Gongcheng Town of plain area. The major soil species suited for vegetable were gray salt paddy soil, gray mud paddy soil and black salt paddy soil, which occupied 92. 42% of total fields suited for vegetable in Licheng. The optimum use and protective measures for regional vegetable fields were discussed and suggested based on the evaluated results.