基于DEM和地理国情普查数据的耕地种植适宜性分析——广西平果市为例

Analysis of Cultivated Land Planting Suitability Base on DEM and Geographic National Census Data——Taking Pingguo City, Guangxi as an Example

耕地是重要的自然资源和农业生产资料,关系到国家粮食安全和社会经济发展,保护耕地是我国最重要的工作之一。要实现耕地有效保护,必须掌握耕地的质量和各个质量耕地的分布情况,而坡度是衡量耕地质量的重要指标,因此,研究耕地坡度级别以及空间分布对于耕地保护和粮食安全有着重要意义。研究以平果市为例,利用全市5米网格DEM生成坡度数据,并将坡度分为5级,融合地理国情普查的耕地数据,获得平果市耕地的坡度分级数据,并对耕地按照水田和旱地进行统计和空间分析,从而获得平果市两类耕地的坡度分级数据以及空间分布离散度,为耕地保护和开发提供有益借鉴。

Cultivated land is important natural resource and agricultural means of production, which is related to national food security and socio-economic development. Protecting cultivated land is one of the most important tasks in China. In order to achieve effective protection of cultivated land, it is necessary to master the quality of cultivated land and the distribution of each quality of cultivated land.Slope is an important indicator to measure the quality of cultivated land. Therefore, it is important to study the grade and spatial distribution of cultivated land slope for the protection of cultivated land and food security. Taking Pingguo city as an example, this study uses the 5-meter grid DEM of the whole city to generate slope data, and divides the slopes into five grades. Combining the cultivated land data of geographic national census, it obtains the slope classification data of the cultivated land in Pingguo city, and conducts statistics and spatial analysis on the cultivated land according to paddy fields and dry lands, so as to obtain the slope classification data and spatial distribution dispersion of the two types of cultivated land in Pingguo city, providing a useful reference for the protection and development of cultivated land.