摘要
煤炭开采导致地表发生大面积沉陷,耕地资源严重破坏.开展采煤沉陷区耕地土壤性质变异规律研究,对于指导矿区土地复垦具有十分重要的意义.本文研究了焦作矿区韩王矿沉陷区不同沉陷部位和不同深度耕地的土壤肥力特征,结果表明：沉陷区耕地土壤有机质、肥力指标空间异质性显著;与非沉陷区耕地相比较,沉陷区耕地上层土壤（0-20 cm）有机质、氨氮、硝氮、全钾、速效磷含量相对较低,而下层（20-40 cm）土壤各项指标相对较高,且部分采样点营养元素在不同深度上呈现出“逆序”分布特征,表明采煤引发的地表沉陷使耕地土壤肥力在水平和垂直方向上均发生了显著变化,而这些变化是导致沉陷区耕地退化、生产力降低的重要原因.
Coal mining results in large - scope land subsidence and farmland damage. It is very important to study on the soil property and its spatial variation for reclamation and reutilization of mining subsided land. The paper took Hanwang coal mining subsided area in Jiaozuo as an example to study soil fertility characters in different sites and layers. The results showed that the spatial variations of organic matter and fertility indicators in the subsided soil were remarkable. Compared with non - subsided area, the contents of organic matter and different species of N, P and K in upper layer （0 -20cm） of subsided area were relatively low, while those in deep layer （20 -40cm） were relatively high. The fertility indicators of different layers in the subsided soil presented in ＂reverse order＂, the contents of different species of N, P and K in upper soil were lower than those of deep soil, which indicated that land subsidence in coal mining area induced the remarkable variation of soil fertility in the horizontal and vertical distribution, and it was the main reason that results in the farmland degradation and crop productivity depression.
出处
《河南理工大学学报（自然科学版）》
CAS
2007年第5期588-592,共5页
Journal of Henan Polytechnic University（Natural Science）
基金
国家科技支撑计划重大项目子课题(2006BAC01A01-04)
河南理工大学博士基金资助项目(648523)
关键词
煤炭开采
地表沉陷
土壤肥力
空间变异
coal mining
land subsidence
soil fertility
spatial variation
