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首页> 外文期刊>Archives of Agronomy and Soil Science >Effect of heavy metal contaminated sewage sludge on soil microbiological properties and growth of Indian mustard
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Effect of heavy metal contaminated sewage sludge on soil microbiological properties and growth of Indian mustard

机译：重金属污染的污泥对印度芥菜土壤微生物学特性和生长的影响

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A laboratory incubation and pot experiment were carried out to study the effect of amendment of uncontaminated and metal contaminated sewage sludge on soil microbial biomass carbon (C), soil enzyme activities and growth of Indian mustard in a sandy loam soil. The application of metal contaminated sewage sludge containing chromium (Cr) (2400mg kg-1), nickel (Ni) (400mg kg-1) and lead (Pb) (2400 mg kg-1) had a detrimental effect on soil microbial biomass C and soil enzyme activities at different levels. Metals present in sewage sludge inhibited the microbial biomass carbon by 5.6-19.0% at different levels after 90 days of incubation. Dry matter yield, uptake of nitrogen (N), phosphorus (P) and potassium (K) increased significantly with the increasing levels of uncontaminated sewage sludge, whereas, amendment of metal contaminated sewage sludge at the levels of 40 and 80t ha-1 decreased the growth of Indian mustard. The accumulation of Cr, cadmium (Cd), Ni and Pb was 997, 36, 793 and 620mg kg-1, respectively, in the shoots of Indian mustard. Sewage sludge contaminated with metals Cr, Ni, and Pb at double the EU limits showed adverse effect on soil microbiological activities and growth of Indian mustard.
机译：进行了实验室孵化和盆栽实验，研究了未污染和金属污染的污水污泥的改良对沙壤土土壤微生物生物量碳（C），土壤酶活性和印度芥菜生长的影响。含有铬（Cr）（2400mg kg-1），镍（Ni）（400mg kg-1）和铅（Pb）（2400 mg kg-1）的金属污染的污水污泥的施用对土壤微生物生物量C有不利影响和土壤酶活性的不同水平。孵化90天后，污水污泥中存在的金属在不同水平上抑制了微生物生物量碳5.6-19.0％。随着无污染污水污泥水平的增加，干物质产量，氮（N），磷（P）和钾（K）的吸收量显着增加，而金属污染污水污泥在40和80t ha-1的水平下的减少印度芥菜的增长。印度芥菜芽中Cr，Cd，Ni和Pb的累积量分别为997、36、793和620mg kg-1。两倍于欧盟限值的被金属铬，镍和铅污染的污水污泥显示出对土壤微生物活动和印度芥菜生长的不利影响。

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