Effects of Land Use on Soil Organic Carbon in Water-stable Aggregates

MAO Yan-ling; YANG Yu-sheng; XING Shi-he; CHEN Guang-shui; CUI Ji-chao

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Effects of Land Use on Soil Organic Carbon in Water-stable Aggregates

更新时间：2024-11-07

- Effects of Land Use on Soil Organic Carbon in Water-stable Aggregates
- Vol. 22, Issue 4, (2008)
- 作者机构：
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  CLC： S153.6
- Published：2008
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MAO Yan-ling, YANG Yu-sheng, XING Shi-he, et al. Effects of Land Use on Soil Organic Carbon in Water-stable Aggregates[J]. 2008, 22(4).
DOI：

MAO Yan-ling, YANG Yu-sheng, XING Shi-he, et al. Effects of Land Use on Soil Organic Carbon in Water-stable Aggregates[J]. 2008, 22(4). DOI：

摘要

对福建省建瓯市山地红壤的农业用地(坡耕地、茶园、桔园)、林地(杉木、木荷、封育)不同土层(0-10

10-20 cm)土壤团聚体有机碳含量与贮量进行研究.结果表明:林地开垦作为农地后

>2 mm土壤大团聚体的数量明显下降

<0.25 mm团聚体含量显著上升.不同土地利用方式的土壤大团聚体呈现粒径越大

团聚体有机碳含量越高的趋势

林地不同粒径团聚体有机碳含量都显著高于农业用地.林地随着团聚体粒径增大

土壤碳贮量增加;而农地正好相反

随着团聚体粒径增大

土壤碳贮量反而下降.土壤总有机碳增加主要受到大团聚体有机碳增加的影响

其中>2 mm和0.5～2 mm粒径土壤团聚体对土壤总有机碳贡献最为突出.因此亚热带山地红壤内林地开垦为农业用地会导致富含碳的土壤大团聚体有机碳含量大幅度下降

团聚体的稳定性也随之下降.

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