Relationship Between Organic Matter and Aggregates in Several Eroded Ultisols

WANG Chun-yan; HUANG Li; TAN Wen-feng; HU Hong-qing

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Relationship Between Organic Matter and Aggregates in Several Eroded Ultisols

更新时间：2024-11-07

- Relationship Between Organic Matter and Aggregates in Several Eroded Ultisols
- Vol. 21, Issue 3, Pages: 52-56(2007)
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  CLC： S153
- Published：2007
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WANG Chun-yan, HUANG Li, TAN Wen-feng, et al. Relationship Between Organic Matter and Aggregates in Several Eroded Ultisols[J]. 2007, 21(3): 52-56.
DOI：

WANG Chun-yan, HUANG Li, TAN Wen-feng, et al. Relationship Between Organic Matter and Aggregates in Several Eroded Ultisols[J]. 2007, 21(3): 52-56. DOI：

摘要

以3种侵蚀红壤（轻度、中度、严重）为供试材料

利用干湿筛法获得其不同粒径的水稳性团聚体（〉4 mm

2～4 mm

1～2 mm

0.5～1 mm

0.25～0.5 mm）

分析团聚体中有机质的分布。结果显示

随着侵蚀程度的增强

〉0.25mm水稳性团聚体的含量逐渐下降

而团聚体的分散度却依次升高;无论何种侵蚀程度

湿筛后团聚体的组成均以小粒径团聚体（〈0.25 mm）占优势。轻度和中度侵蚀的红壤

其有机质含量随着团聚体粒径的增大而增大

严重侵蚀的则相反;侵蚀红壤有机质含量和〉0.25 mm水稳定性团聚体呈显著正相关

3种侵蚀红壤团聚体对土壤有机质的贡献为轻度侵蚀〉中度侵蚀〉严重侵蚀。

Abstract

The solk water stable aggregates of different diameter(>4 mm

2~4 mm

1~2 mm

0.5~1 mm

0.25~0.5mm) were gained and determined by drying-wetting sieving method in three kinds of eroded(slightly

medium

severely) ultisols.The paper studied the distributions of organic matter in aggregates.The result indicated that the content of >0.25 mm water-stable aggregate(WSA) took on a falling trend with the enhancing of erosion degree

but the dispersing percent of aggregate(PAD) went up.Small aggregate played an important role after moistened.As to slightly and medium eroded ultisols

the content of their organic matter increased with the enlarging of diameter of aggregate

but it was opposite to severely eroded ultisol.In eroded ultisols

soil organic matter had a marked positive correlation with the content of >0.25mm water-stable aggregates.The contribution of aggregate to soil organic matter is in the sequence of slightly > medium > severely in three kinds of eroded ultisols.

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Related Institution

Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling

Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling

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LI Song-lin1,LU Jun1,ZHANG Feng1,SUN Si-yang2,DENG Ou-ping3(1.College of Environmental Science and Natural Resources,Zhejiang University,Hangzhou 310029,2.Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition,3.China Ministry of Education Key Lab of Environmental Remediation and Ecological Health,)

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