Effect of Combined Heavy Metal Pollution on Nitrogen Mineralization Potential,Urease and Phosphatase Activities in a Typic Udic Ferrisol  

作　　者：ZHENG CHUNRONG TU CONG and CHEN HUAIMAN(Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences,Nanjing 210008 (China))(Received April 20, 1999 revised June 2, 1999) 

出　　处：《Pedosphere》1999年第3期251-258,共8页土壤圈（英文版）

摘　　要：Individual and combined effects of Cu, Pb, Zn and Cd on N mineralization, urease and phosphatase were examined in a Typic Udic Ferrisol in laboratory by employing an uniform design and a single factor design.Soil pollution caused by heavy metals inhibited N mineralization (No value) and urease and phosphatase activities. The combined pollution of metals alleviated their toxicity to N mineralization to some extent,whereas aggravated the toxicity to urease and phosphatase. Phosphorous application could mitigate the toxic effect of heavy metals on phosphatase activities, while alleviating effect of N application on the toxicity of heavy metals to urease was inconsistent. However, the mitigating effect of the fertilizers was limited in heavily polluted soils.INTRODUCTIONAnthropogenicactivitiessuchasmining,smelting,electroplating,ore-refiningandlanddisposalofwasteshaveledtoanincreajseofheavymetalcolltelltsinthesoil(Chen,1996).Heavymetalaccumulationinthesoilimpactsanumberofsoilpropertiesthatmightbethepoten...

关 键 词：heavy metal pollution N mineralization PHOSPHATASE UREASE 

分 类 号：X53[环境科学与工程—环境工程] X131.3