Pedosphere 15(3): 341--346, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Pedogenic and anthropogenic influence on calcium and magnesium behaviors in stagnic anthrosols |
JIANG Yong 1, ZHANG Yu-Ge2, LIANG Wen-Ju1 and LI Qi1 |
1 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China). Email: jiangyong@iae.ac.cn
2 College of Land and Environment, Shenyang Agricultural University, Shenyang 110161 (China) |
| ABSTRACT |
| The formation of Stagnic Anthrosols is closely related to rice planting and parent materials. Six representative pedons, two from each of three Stagnic Anthrosol subgroups, Vertic Haplic-, Vertic Gleyic-, and Sulfic Gleyic-Stagnic Anthrosols, from different parent materials and soil formation processes, from Liaoning Province, China, were selected and used along with additional supporting data to assess the potential impact in each soil subgroup combination of both pedogenic and anthropogenic factors on the migration and geochemical characteristics of calcium (Ca) and magnesium (Mg) and their relations to soil particle-size composition. Results revealed that exchangeable Mg was correlated positively with clay and silt content, but negatively with sand content, suggesting that clay and silt could retain more exchangeable Mg than sand. Also, in the six pedons exchangeable Ca/Mg ratios generally decreased with depth, which was most likely due to the preferential retention of Mg below the Apl horizon and the effects of bio-cycling in rice-soil systems. The pedons with high pH had smaller exchangeable Ca/Mg ratios than those with low pH. Thus, it was concluded that exchangeable Ca/Mg ratios could be helpful in classification of Stagnic Anthrosols. |
| Key Words: anthropogenesis, calcium, magnesium, pedogenesis, Stagnic Anthrosols |
| Citation: Jiang, Y., Zhang, Y. G., Liang, W. J. and Li, Q. 2005. Pedogenic and anthropogenic influence on calcium and magnesium behaviors in stagnic anthrosols. Pedosphere. 15(3): 341-346. |
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