水稻种植适宜性评价及指标选取研究

为合理配置耕地资源，科学制定种植业产业规划，以江苏省仪征市为研究对象，筛选、确定13个指标，基于“仪征市耕地资源管理信息系统”建立层次分析模型、隶属函数模型进行水稻的耕地适宜性评价。结果表明：仪征市高度适宜区的耕地面积占耕地总面积10.20%，适宜耕地面积占56.08%，勉强适宜地区占25.50%，而不适宜耕地面积为8.22%。调查的水稻实际单产与评价获取的适宜度指数存在显著正相关关系（R2=0.1964，319个样本），且高度适宜区的水稻实际产量高于勉强适宜区、适宜区，不适宜区的水稻产量最低。

Study on Cultivated Land Suitability Evaluation for Rice and Index Determination

Cultivated land is more important resources for all crops. In order to draw the planting plan and utilize cultivated land properly, a case was determined to Yizheng City in Jiangsu Province. Considering climate, soils, landform, environment of Yizheng City, 13 indexes were sieved and determined for rice suitability evaluation for cultivated land of Yizheng City, and hierarchical analysis model and membership function model were built based on Yizheng Cultivated Land Resources Management Information System. The results indicated that, according as accumulative curve and clustering analytical method, these cultivated land areas were plotted out 4 zone, including the best suitable zone, suitable zone, little suitable zone and not suitable zone. Cultivated land areas in the best suitable zone counted 10.20% for the whole areas. Cultivated land areas in the suitable zone and little suitable zone counted 56.08%, 25.50% for the whole areas, respectively. Cultivated land areas in the not suitable zone counted 8.22% for the whole areas. To validate the veracity for rice suitability evaluation, the actual yield of rice were investigated in the Yizheng City, and the rice yield of 319 croplands was recorded. There was a positive relationship between actual rice yield form investigation and suitability index obtained in the evaluation (R2=0.1964, 319 samples). The trend of results between actual yield of rice and rice suitability evaluation were consilient, and the suitability index could reflect rice yield of cultivated land.