基于GIS的琼海市胡椒土地适宜性评价

根据胡椒生长的土地利用要求,结合相关数据评价海南省琼海市胡椒适宜用地数量、质量及分布。以土地适宜性评价理论为基础,以海南省琼海市土地为评价对象,以土地利用现状图图斑为评价单元,结合琼海市的气候、土壤、地质地貌等资源数据库,选择土壤质地、坡度等10个评价因子建立数据库,借助GIS与加权指数求和法评价模型进行评价。结果表明:琼海市胡椒种植用地面积占市域总面积的91%,全市胡椒种植用地质量总体良好。胡椒适宜区用地资源主要分布在阳江、龙江、石壁、温泉、大路、烟塘、长坡。结合海南省琼海市胡椒种植用地现状和评价分析结果,对各级用地分别提出建议,这对琼海市胡椒的增产增收具有重要意义。

Evaluation of Soil Suitability for Pepper Planting in Qionghai City Based on GIS

The purpose of this study is to evaluate the quantity , quality and distribution of the land suitable for pepper planting in Qionghai city , Hainan province .Based on the theory of land suitability evaluation , this study took the present land -use map spot of Qionghai city as the evaluation unit , selected 10 evaluation factors （soil texture, slope, etc.） from the climatic, soil and geolog-ical databases to set up a database , and evaluated the soil suitability for pepper production in Qionghai city based on GIS and weigh -ted index summation model .The results showed that the land area of pepper cultivation in Qionghai city accounted for 91%of the total land area , and the quality of pepper cultivation land in this city was generally good .The land resources suitable for pepper pro-duction were mainly distributed in Yangjiang , Longjiang, Shibi, Wenquan, Dalu, Yantang, and Changpo.According to the above land-use status and evaluation results , the author put forward some suggestions on the proper use of all levels of land , which had an important significance for the yield increase and income increase of pepper production in Qionghai city .