Research on the Spatial Variation of Soil Fertility Characters in Coal Mining Subsidence Area
Underground coal mining results in large-scope land subsidence and farmland damage. It is very important to study the soil property and its spatial variation for reclamation and reutilization of mining subsided land. In this paper, Hanwang coal mining subsided area in Jiaozuo city, Henan province, China, was taken as an example to study on the soil fertility characters in different sites and layers. The results show that: (1) the spatial variations of organic matter and fertility indicators in the subsided soil are remarkable (p=0.05); (2) 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 are relatively low, while in deep layer (20-40cm) are relatively high. And the fertility indicators of different layers in the subsided soil present in reverse order, which the contents of different species of N, P and K in upper soil are lower than those of deep soil. These results indicate that land subsidence in coal mining area can induce the remarkable variation of soil fertility in the horizontal and vertical distribution, and it may be the main reason that results in the farmland degradation and crop productivity depression.
coal mining land subsidence soil fertility spatial variation
Zhao Tong-qian Xu Hua-shan Guo Xiao-ming He Yu-xiao Tai Chao
Department of Resource & Environment, Henan Polytechnic University, Jiaozuo city, Henan province, China 454000
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
2747-2752
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）