Stability Characteristics of Soil Organic Carbon Under Brushwood Vegetation in Dry Valley of the Upper Reaches of Minjiang River

JIANG Guang-zheng; GONG Yuan-bo; CHEN Lin-wu; ZUO Qin; LIU Jin-xin; YUE Yan-jie; ZHANG Xing-hua

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Stability Characteristics of Soil Organic Carbon Under Brushwood Vegetation in Dry Valley of the Upper Reaches of Minjiang River

更新时间：2024-11-07

- Stability Characteristics of Soil Organic Carbon Under Brushwood Vegetation in Dry Valley of the Upper Reaches of Minjiang River
- Vol. 25, Issue 5, (2011)
- 作者机构：
  
  1. 四川农业大学长江上游林业生态工程四川省重点实验室
  2. 四川省林业科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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JIANG Guang-zheng, GONG Yuan-bo, CHEN Lin-wu, et al. Stability Characteristics of Soil Organic Carbon Under Brushwood Vegetation in Dry Valley of the Upper Reaches of Minjiang River[J]. 2011, 25(5).
DOI：

JIANG Guang-zheng, GONG Yuan-bo, CHEN Lin-wu, et al. Stability Characteristics of Soil Organic Carbon Under Brushwood Vegetation in Dry Valley of the Upper Reaches of Minjiang River[J]. 2011, 25(5). DOI：

摘要

灌丛在岷江上游分布广泛

是干旱河谷区重要的物种

砍伐、开垦和过度放牧是导致其退化的根本驱动力。通过选取灌丛植被下土壤剖面

并以其被开垦后的农地(50a)及退耕荒坡(10a)为参照

对其土壤有机碳、重组有机碳及易氧化碳含量进行分析比较。结果表明:灌丛植被各层土壤总有机碳及重组有机碳均极显著大于对照的

对照间差异不显著

在0-100cm土壤剖面

对照1退耕荒坡及对照2农地土壤有机碳较灌丛植被的最高降幅分别达60.42%

70.92%

重组有机碳最高降幅则分别达76.54%

68.92%

并且灌丛及对照2农地土壤重组碳在0-100cm土层剖面上表现出先升高

然后再降低的分布特征

对照1退耕荒坡则在整个土壤剖面呈递减趋势;灌丛植被土壤易氧化碳均值高于对照的

与退耕荒坡的差异显著

但与农地的差异不显著

在0-100cm土层中

灌丛及对照土壤易氧化碳含量表现出先降低、升高、再降低的分布特征;相关分析表明

总有机碳与重组有机碳和易氧化碳达到极显著相关水平。综上表明灌丛植被保护土壤有机碳稳定能力极显著高于退耕荒坡和农地的

并且农地退耕也有利于土壤有机碳稳定性的提高。

Abstract

As an important species in arid valley

brushwood is widespread in the upper reaches of Minjiang river

human deforestation

reclamation and overgrazing are the fundamental driving forces for its degradation.By selecting soil profiles under brushwood vegetation

meanwhile

taking farmland(50 a) and abandoned land(10 a) as references

soil organic carbon(SOC)

heavy-fraction organic matter(HF-OM) and readily oxidizable carbon(ROC) for these soil profiles were analyzed and compared.The results indicated that:The SOC...

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