牙克石市东山煤矿采煤塌陷区基于植被恢复的土地适宜性评价

LAND SUITABILITY EVALUATION OF VEGETATION RESTORATION OF COAL MINING SUBSIDENCE AREA IN DONGSHAN AREA

以内蒙古牙克石市大兴安岭西坡东山煤矿采煤塌陷区为研究对象,选取塌陷深度、污染程度、稳定情况、土壤有机质含量、地形坡度等因子,采用可拓法对采煤塌陷区进行林地和草地方向的植被恢复土地适宜性评价。结果表明:将采煤塌陷区恢复为林地的等级为中度适宜,但宜林类总关联最大值为-0.081,属于-1≤K j(x)≤0,不适宜恢复为林地;宜草类总关联最大值为0.052,属于0≤K j(x)≤1,其土地适宜性等级为中度适宜,宜草类总关联最大值大于宜林地总关联最大值,采煤塌陷区应该恢复为草地,采煤塌陷区植被选取当地建群种羊草。

Subsidence area in Dongshan coal mine in Yakeshi Daxing＇aning western slope caused a lot of local environmental prob- lems. This study evaluate land suitability of this area, selecting collapse depth, pollution levels, stability, soil organic matter content, the slope of tile terrain and other factors, and using the extension method. The results show that： the class, study area reverting to woodland grades, is defined as moderate suitability, but total correlation maximum values is -0. 081 for appropriate forest class, belonging to -1≤Kj（x）≤0, indicating the area is not suitable for forest restoration; a maximum value is 0. 052 for appropriate grass general association, belonging to the 0≤Kj（z）≤1, indicating study area conforms to moderate suitability, and the area is suitable for grassland. Leymus chinensis, local constructive species of the vegetation, is selected as main vegetation.