Pedosphere 17(4): 419--428, 2007
ISSN 1002-0160/CN 32-1315/P
©2007 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of long-term application of inorganic fertilizers on biochemical properties of a rice-planting red soil |
ZHONG Wen-Hui1,2 , CAI Zu-Cong1 and ZHANG He2 |
1 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: w.h.zhong@yeah.net
2 College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097 (China) |
| ABSTRACT |
| A long-term experiment was set up in Yingtan of Jiangxi Province to investigate the effects of long-term application of inorganic fertilizers on the biochemical properties of a rice-planting soil derived from Quaternary red earth. Noncultivated soils are extremely eroded and characterized by a low pH and deficiencies in available nutrients, in particular P and N. After 13 years of inorganic fertilization in cultivation for double-cropped rice, the biochemical properties of the soil were changed. The nitrification potential and urease activity were higher in the treatments with N application than those without N application. Acid phosphatase activity and dehydrogenase activity were also higher in the treatments with P application than in those without P application. The dehydrogenase activity correlated well with the concentrations of both total P and hydrolysable N and with rice crop yield, suggesting that dehydrogenase activity might be a suitable indicator for improvement in soil fertility. |
| Key Words: enzyme, ergosterol, inorganic fertilizer, nitrification potential, rice-planting red soil |
| Citation: Zhong, W. H., Cai, Z. C. and Zhang, H. 2007. Effects of long-term application of inorganic fertilizers on biochemical properties of a rice-planting red soil. Pedosphere. 17(4): 419-428. |
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