Pedosphere 7(4): 349--354, 1997
ISSN 1002-0160/CN 32-1315/P
©1997 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of rice-based cropping system on organic matter status in soils |
| XIAO Yong-Lan1, ZHANG Yang-Zhu1, HU Rui-Zhi1, HUANG Yun-Xiang1, ZHOU Qing1, YUAN Zheng-Ping1, YANG Dong-Ping2 and SHU Li3 |
1 Department of Natural Resources, Hunan Agricultural University, Changsha 410128 (China);
2 Soil and Fertilizer Center of Northern District of Yueyang Municipality, Yueyang 414000 (China);
3 The Government of Yongding District of Zhangjiajie Municipality, Zhangjiajie 417000 (China) |
| ABSTRACT |
| A long-term simulation experiment was carried out to study the effect of rice-based cropping system, green manure and ground-water level on soil organic matter. Soil organic matter content increased when upland soil was puddled and cropped under submerged conditions. Among all treatments, soil organic matter contents in the treatments of rice-rice-flooded fallow in winter (WF) were the highest, those in the treatments of rice-rice-astragalus (WG) came the second, and those in the treatments of rice-rice-rape (WR) were the lowest. At the same rate of green manure application, the degrees of organo-mineral complexing in soils of treatments WG and WR were higher than those of treatment WF. After 9-year rice cultivation, the state of combination of humus in heavy fraction varied with treatments. The relative content of loosely bonded humus decreased in the order of WR > WG > WF, and it correlated significantly with Se availability. |
| Key Words: degree of organo-mineral complexing, organic matter, rice-based cropping system, Se availability |
| Citation: Xiao, Y. L., Zhang, Y. Z., Hu, R. Z., Huang, Y. X., Zhou, Q., Yuan, Z. P., Yang, D. P. and Shu, L. 1997. Effect of rice-based cropping system on organic matter status in soils. Pedosphere. 7(4): 349-354. |
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