根系分泌的有机酸及其对喀斯特植物、土壤碳汇的影响

赵宽; 吴沿友

doi:10.3969/j.issn.1001-4810.2011.04.019

根系分泌的有机酸及其对喀斯特植物、土壤碳汇的影响

doi: 10.3969/j.issn.1001-4810.2011.04.019

赵宽¹,
吴沿友²

1.
现代农业装备与技术教育部重点实验室/江苏大学农业工程研究院
2.
中国科学院地球化学研究所/环境地球化学国家重点实验室

基金项目: 国家自然科学基金项目(40973060)、中国科学院战略性先导科技专项重大课题(XDA05070400)、贵州省社会发展科技攻关计划项目(SY[2010]3043)

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出版历程
- 收稿日期: 2011-10-24
- 发布日期: 2011-12-25

Influence of root-secreted organic acid on plant and soil carbon sequestration in karst ecosystem

ZHAO Kuan¹,
WU Yan-you²

1.
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Institute of Agricultural Engineering, Jiangsu University
2.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

摘要

摘要: 根系分泌的有机酸是土壤有机酸的重要动态来源,来源于光合作用固定的碳,是土壤碳流动的最活跃形式。根系分泌的有机酸是一种具有调节作用的植物和土壤碳汇。一方面,在喀斯特土壤环境中,植物根系分泌有机酸的含量增加,影响碳汇的产生和流动,直接调节植物与土壤的固碳增汇能力;另一方面,根系分泌的有机酸通过影响土壤中一系列的动态化学和生物学过程,对土壤养分有效性和养分循环以及微生物的活性产生深刻影响,直接影响土壤的固碳增汇能力,从而间接影响植物的固碳增汇能力。因此,根系分泌的有机酸在喀斯特生态系统的固碳增汇中起着重要作用。
- 喀斯特 /
- 土壤 /
- 植物 /
- 微生物 /
- 微量元素 /
- 根系分泌有机酸 /
- 碳汇
Abstract: Root-secreted organic acid is an important dynamic source of soil organic acid, the carbon from photosynthetic fixation is the most active form in the soil carbon flow. Root-secreted organic acid is a kind of plant and soil carbon sequestration with regulating action. On one hand, plant roots increases the content of root-secreted organic acid which affected the production and flux of carbon sequestration under karst soil environment, directly regulating carbon sequestration of plant and soil. On the other hand, root-secreted organic acid has a profound impact on soil nutrient availability and nutrient cycle, and microbial activity by affecting a series of dynamic chemical and biological processes in the soil, which directly impacts on soil carbon sequestration, thereby, indirectly affecting carbon sequestration of the plants. Therefore, root-secreted organic acid plays an important role on carbon sequestration in karst ecosystem.
- karst /
- soil /
- plant /
- microorganism /
- trace element /
- root-secreted organic acid /
- carbon sequestration

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