东北低山丘陵区土地适宜性评价与潜力分析——以吉林省西南部黑牛河流域为例

喀斯特地区土地的石漠化与地层岩性、河流切割、土壤侵蚀、坡度及人类活动等有关。主要从岩性方面来分析喀斯特地区石漠化的成因,并以贵州高原的清镇市为例,结合石漠化的相关数据,运用GIS工作平台及计算机数据统计分析系统,分析各岩层组中各岩性石漠化的分布及等级,从而得出石灰岩地区的石漠化面积最大,石漠化程度最高,而泥灰岩地区的石漠化面积最少。因此,喀斯特地区的地层岩性与石漠化的级别和分布有密切关系。

An Analysis on Relation of Rock Desertification to Stratum and Lithology in Karst Region--A Case Study at Qingzhen City of Guizhou Plateau

According to the survey of the land use in Heiniu river watershed,the adaptability of the land use is assessed,and the productive potentiality and the population-carrying capacity are analyzed.The results showamong the 1531.55hm² land in Heiniu river watershed,there are farming land 45.64%,forestry land 40.57%,orchard land 0.74% and pasture land 1.07%.In addition,there is 5.44% of the land,which has not been used but can be used for forestry and orchard.There are 87.35% of the farming lands which are in middle or low productivity,and have high potential production.A land use plan about rational utilization and improving the land production in hilly region in northeast China is advised.