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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