Abstract：This paper is conducted in the nutrient and heavy metal characteristics of coal ash substrates during natural vegetation restoration and artificial vegetation restoration in coal ash pile of Di-dao gangue fired power plant in JIXI Heilongjiang province,and the effect of different vegetation restoration on nutrient and heavy metal status of coal ash substrates is analyzed.Results are as below: 1) the nutrient content of coal ash substrates is extremely disproportion,organic matter,total N and available P are extreme deficiency,available N and available K are rich.2) During the processes of pilling up,the nutrients in the coal ash is leaching.The loss degree of total nutrition is higher than that of available nutrition.3) The artificial vegetation restoration processes could significantly improve the nutrient status of surface coal ash substrates.the organic matter content increases by 459.28%,total N content increases by 238.46%,total P content increases by 131.4%,contents of available N、P and K increase by 30.17%,56.29% and 22.58% respectively.4)Hg is the main heavy metal exceeding standard in the coal ash stacking yard and carrying soil restoration pattern decreases efficiently the amount of heavy metal in the coal ash substrates.Compared with the heavy metal in the sample fields with natural vegetation restoration,the amount of Hg,Cu,and Cr has decreases by 66.93%,68.82% and 16.09% separately.
王笑峰1,2；蔡体久1；龚文峰2；任晓旭1；刘文勇1. 粉煤灰堆场植被恢复过程的养分效应及重金属变化特征[J]. 中国水土保持科学, 2009, 7(6): 68-73.
WANG Xiao-Feng-；Ca-Ben-Jiu-；Gong-Wen-Feng-；Lin-Xiao-Xu-；Liu-Wen-Yong. Efficiency of nutrition and heavy metal variable features in coal ash stacking yard during vegetation restoration. SSWCC, 2009, 7(6): 68-73.
2009, Vol. 7 
