基于GIS的七台河市耕地适宜性评价

Evaluation on Suitability of Cultivated Land in Qitaihe City Based on GIS

黑龙江省的大部分地区土地的土壤肥力高、供肥能力强,是中国粮食生产大本营之一.以黑龙江省七台河市作为研究对象,利用土壤数据、DEM数据、温度数据,选取立地因素、土壤因素、气候因素建立耕地适宜性评价体系.此次研究结合GIS技术,对七台河市土地进行耕地适宜性评价,将评价结果分成4个等级,其中七台河市高度适宜地区面积为168.54 km^2,占全市面积的2.70%;中度适宜地区面积为1982.67 km^2,占总面积的31.78%;勉强适宜地区面积为1798.03 km^2,占总面积的28.82%;不适宜地区面积为2289.23 km^2,占总面积的36.70%.

Most of the land in Heilongjiang Province has high soil fertilizer ability and strong fertilizer supply ability,which is one of the bases of grain production in China.Taking Qitaihe City of Heilongjiang Province as the research object,the suitability evaluation system of cultivated land was established by using soil data,DEM data and temperature data to select site factors,soil factors and climate factors.Combined with GIS technology,the cultivated land suitability of Qitaihe City was evaluated,and the evaluation results were divided into four grades.Among them,the area of highly suitable area in Qitaihe City is 168.54 km^2,accounting for 2.70%of the total area,the area of moderately suitable area is 1982.67 km^2,accounting for 31.78%of the total area,and the area of barely suitable area is 1798.03 km^2,accounting for 28.82%of the total area.The area of unsuitable area is 2289.23 km^2,accounting for 36.70%of the total area.