Pedosphere 16(4): 525--531, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of management practices on seasonal dynamics of organic carbon in soils under bamboo plantations |
ZHOU Guo-Mo 1,2, XU Jian-Ming1 and JIANG Pei-Kun2 |
1 College of Resources and Environment, Zhejiang University, Hangzhou 310029 (China). E-mail: zhougm@zjfc.edu.cn;
2 Zhejiang Forest College, Lin'an 311300 (China) |
| ABSTRACT |
| Soil samples for conventional management (CM) and intensive management (IM) practices were taken over a year at 2-month intervals to determine the effect of management practices on soil organic carbon (SOC) and to quantify seasonal dynamics in SOC for bamboo (Phyllostachys pubescens Mazel ex H. de Lehaie) stands. The results with IM compared to CM showed large decreases in total organic carbon (TOC), microbial biomass carbon (MBC), water-soluble organic carbon (WSOC), and the MBC/TOC ratio in the soils. With all IM plots in the 0-20 cm depth across sampling periods, average decreases compared with CM were: TOC, 12.1%; MBC, 26.1%; WSOC, 29.3%; the MBC/TOC ratio, 16.1%; and the WSOC/TOC ratio, 20.0%. Due to seasonal changes of climate, seasonal variations were observed in MBC and WSOC. Soil MBC in the 0-20 cm depth in September compared to May were 122.9% greater for CM and 57.6% greater for IM. However, due primarily to soil temperature, soil MBC was higher during the July to November period, whereas because of soil moisture, WSOC was lower in July and January. This study revealed that intensive management in bamboo plantations depleted the soil C pool; therefore, soil quality with IM should be improved through application of organic manures. |
| Key Words: bamboo (Phyllostachys pubescens), conventional management, dynamics, intensive management, soil organic carbon |
| Citation: Zhou, G. M., Xu, J. M. and Jiang, P. K. 2006. Effect of management practices on seasonal dynamics of organic carbon in soils under bamboo plantations. Pedosphere. 16(4): 525-531. |
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