基于GIS的玉米用地适宜性评价研究──以辽宁省凌源市西南部6乡镇为例

Evaluation of Suitability of Land for Corn Based on GIS──A Case of 6 Townships in Southwest Lingyuan City of Liaoning Province

以土地适宜性评价理论为基础,探讨了玉米用地的适宜性评价。以辽宁省凌源市西南部6乡镇耕地为研究对象,以土地利用现状图图斑为评价单元,选取了土壤质地、坡度等9个因素建立数据库,采用极限条件法与综合指数法相结合划分了玉米用地的适宜性等级。还针对划分的适宜性等级,提出了玉米用地可持续利用的建议。

This research evaluated the suitability of land resources for corn production based on the theory of land evaluation. Taking the cultivated land of 6 townships in southwest Lingyuan city of Liaoning province as the studied objects, selecting nine factors such as soil texture, slope, organic matter content and so on as evaluation factors, the rating of suitability of the land was divided by using the method of limit condition and IFI, the results showed the most suitability rating was moderate one, accounting for 80.10 %, which illustrated the most cultivated land of the studied area was generally good for the development of corn fanning. In addition, the author proposed some suggestions on the sustainable utilization of land for corn.