Affiliation:
1. Liaoning Technical University
Abstract
To understand the effects of arsenic on enzyme activity of soil microorganisms in mining area, 18 soil samples were taken from Xinqiu open-pit mining area. The mechanism of soil microorganisms in response the change of arsenic concentration was studied by a pot experiment. The effects of arsenic on the activity of invertase, urease and catalase in soil microorganisms were characterized by enzyme activity experiment. The results showed that the microbial biomass in soil decreased with continuous elevated arsenic concentration. However, no significant effect was observed on the composition of microflora with the change of arsenic concentration. In soil microbial community, the predominant microorganism was bacteria (about 80%), then followed by actinomycetes and fungi. Most importantly, high concentration of arsenic obviously inhibited the activities of enzymes in soil especially for invertase and urease. The results obtained in this study provide additional insights into the microbial metabolic mechanisms under different concentration of arsenic in soil microbial community.
Publisher
Trans Tech Publications, Ltd.
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