煤矸石山坡面土壤营养元素状况分析

Analysis of Nutrient Element of Surface Soil on Coal Gangue Slope

煤矸石山进行覆土是植被修复的关键一步,而覆土又会对其基质中的营养元素产生一定的影响,同时,由于煤矸石山不同坡面上水分、温度等环境因子不同造成土壤营养元素含量也不同,影响了植物的生长。本文研究不同的覆土比例对煤矸石基质中各营养元素含量的影响,并选取了山西省阳泉市280煤矸石山阳坡、半阳坡、阴坡、半阴坡和平台共5种坡面,研究其下土壤中营养元素的差异。研究表明:黄土的加入降低了煤矸石渣土中有机质、全氮、全磷、全钾的含量,且二者呈线性相关,在5种坡面中,全氮含量与有机质含量的大小顺序为:半阳坡>阴坡>阳坡>半阴破>平台,有效磷和速效钾的含量大小顺序为半阳坡>平台>阴坡>阳坡>半阴坡,为进一步的植被恢复提供了基础。

Covering soil is crucial procedure for the coal gangue mountain repairing, which influences the soil nutrition element of gangue mountain. Besides, the environmental factors such as moisture content and temperature vary from different slope of gangue mountain, which lead the difference of nutrient element content and influences plant growing. In this paper, the effect of different proportion of covering soil on nutrient elements in coal gangue was studied. 5 slopes surface of sunny, semi-sunny, shady, semi-shady and platforms on 280 gangue mountains in the Yangquan City of Shanxi Province were selected the nutrient elements in different soil condition studied. Results showed that the content of organic matter, total nitrogen, total phosphorus and total potash were reduced by adding of loess, and there was a linear correlation. In addition, among the five kinds of slop, total nitrogen content and organic matter content were for this order： semi-sunny 〉 shady 〉 sunny 〉 semi-shady 〉 platforms, and the content of rapidly-available phosphorus and available potash were for this order： semi-sunny 〉 platforms 〉 shady 〉 sunny 〉 semi-shady. The research lays a theo- retical base for the future vegetation restoration.