Pedosphere 9(3): 251--258, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Effect of combined heavy metal pollution on nitrogen mineralization potential, urease and phosphatase activities in a Typic Udic Ferrisol
ZHENG Chun-Rong, TU Cong and CHEN Huai-Man
Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China)
ABSTRACT
      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 (N0 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.
Key Words:  heavy metal pollution, N mineralization, phosphatase, urease
Citation: Zheng, C. R., Tu, C. and Chen, H. M. 1999. Effect of combined heavy metal pollution on nitrogen mineralization potential, urease and phosphatase activities in a Typic Udic Ferrisol. Pedosphere. 9(3): 251-258.
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