Fresh additions of heavy metals do not model long-term effects on microbial biomass and activity

被引:80
作者
Renella, G [1 ]
Chaudri, AM [1 ]
Brookes, PC [1 ]
机构
[1] IACR Rothamsted, Dept Soil Sci, Harpenden AL5 2JQ, Herts, England
关键词
microbial biomass; heavy metals; respiration; specific respiration;
D O I
10.1016/S0038-0717(01)00150-X
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Previous work has reported adverse effects of long-term exposures of heavy metals (e.g. Cu, Ni, Cd and Zn) on soil microbial biomass (up to 50% decrease) and microbial activity at metal concentrations around current European Union permitted limits. Our aim was to see if we could model such changes in short-term (up to 50 days) laboratory incubations where soils were given a single pulse of metal salts. Such additions. however, caused only small changes in the measured variables. It was concluded that such short-term incubations are a poor model of changes in microbial biomass or activity due to chronic exposure to metals. (C) 2002 Elsevier Science Ltd. All fights reserved.
引用
收藏
页码:121 / 124
页数:4
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