Pedosphere 12(3): 219--228, 2002
ISSN 1002-0160/CN 32-1315/P
©2002 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Combined eEffect of nutrient and pest managements on substrate utilization pattern of soil microbial population in hybrid rice cropping system |
| LIAO Min1, XIE Xiao-Mei1, A. SUBHANI1 and S. KLOSE2 |
1 Natural Resources Science Department, College of Environmental and Resources Sciences, Zhejiang University Hua Jia Chi Campus, Hangzhou 310029 (China);
2 Institute of Soil Science, Faculty of Forest, Geography and Hydrology Sciences, Dresden University of Technology, D-01735 Tharandt (Germany) |
| ABSTRACT |
| A field experiment was conducted to study the combined effect of nutrient and pest managements on soil biomass phospholipid contents, functional biodiversity and substrate utilization patterns of soil microbial populations in hybrid rice cropping system. The mineral N, P and K fertilizers (as urea, calcium superphosphate and KCl respectively) were incorporated at 100, 25, and 100 kg ha-1, respectively, and the various pesticides were applied at the recommended rates. The results of the experiment demonstrated a decline in the microbial abundance and soil microbial biomass phospholipid contents with the advancement of crop growth, and significant changes in substrate utilization pattern of soil microbial population studied were observed with different management practices and at different growth stages. The principal component analysis (PCA) using all 95-carbon sources (BIOLOG plates) gave good differentiation among the treatments, indicating that they have different patterns of carbon utilization under different habitats. The data showed that diversity in microbial community continuously changed with the progression in crop stage, particularly at physiological maturity (PM) stage that was evident from the utilization of different carbon sources at various crop stages. |
| Key Words: BIOLOG, nutrient, pest management, soil microbial population, substrate utilization pattern |
| Citation: Liao, M., Xie, X. M., Subhani, A. and Klose, S. 2002. Combined eEffect of nutrient and pest managements on substrate utilization pattern of soil microbial population in hybrid rice cropping system. Pedosphere. 12(3): 219-228. |
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