[Effects of heavy metals pollution on soil microbial communities metabolism and soil enzyme activities in coal mining area of Tongchuan, Shaanxi Province of Northwest China].
This paper studied the metabolism of soil microbes, functions of soil microbial communities, and activities of soil enzymes in a coal mining area of Tongchuan. In the coal mining area, the concentrations of soil Cu, Zn, Cd, and Pb were significantly higher than those in the non-mining area, of which, Cd contributed most to the heavy metals pollution. By adopting Biolog method combining with principal component analysis (PCA) and cluster analysis, it was found that the metabolic characteristics of different soil microbial communities varied significantly with increasing soil heavy metals pollution, and the variation was mainly manifested in the metabolic patterns of carbon sources such as saccharides and amino acids. In slightly and moderately polluted soils, the utilization of carbon sources by soil microbial communities was activated; while in heavily polluted soils, the carbon sources utilization was inhibited. The activities of soil urease, protease, alkaline phosphatase, and catalase all tended to decline with intensifying soil heavy metals pollution. The soil urease, protease, alkaline phosphatase, and catalase activities in the coal mining area were 50.5%-65.1%, 19.1%-57.1%, 87.2%-97.5%, and 77.3%-86.0% higher than those in the non-mining area, respectively. The activities of soil sucrase and cellulase were activated in slightly and moderately polluted soils, but inhibited in heavily polluted soils.
College of Sciences, Northwest A & F University, Yangling 712100, Shaanxi, China. guoxinliang666@163.com
Xing-Liang
XL
Guo
Jie
J
Gu
Zhi-Xue
ZX
Chen
Hua
H
Gao
Qing-Jun
QJ
Qin
Wei
W
Sun
Wei-Juan
WJ
Zhang
D001419:Bacteria / Q000378:metabolism; D002681:China; D003300:Copper; D017753:Ecosystem; D019216:Metals, Heavy / Q000032:analysis*; D008906:Mining; D010447:Peptide Hydrolases / Q000032:analysis; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis*; D013393:Sucrase / Q000032:analysis; D014510:Urease / Q000032:analysis
D019216:Metals, Heavy; D012989:Soil Pollutants; D003300:Copper; D013393:Sucrase; D010447:Peptide Hydrolases; D014510:Urease