土壤碳转化对大气CO2升高响应机制研究进展

被引：12

作者：

陈栋

郁红艳

邹路易

滕跃

机构：

[1] 江南大学环境与土木工程学院/江苏省厌氧生物技术重点实验室

来源：

核农学报 | 2017年 / 31卷 / 08期

关键词：

CO2浓度升高; 土壤有机碳; 碳转化; 微生物; 酶;

D O I：

暂无

中图分类号：

S153.6 [土壤成分];

学科分类号：

0903 ; 090301 ;

摘要：

土壤有机碳是地球表层最大的碳库,其微小的变化将影响大气CO2浓度,而使土壤成为CO2的源或汇。在大气CO2浓度升高的大背景下,土壤碳库的转化与更新过程在时间和空间上发生改变。由于土壤本身及环境条件的差异性,土壤碳转化过程对CO2浓度上升的响应差异较大,要阐明这些差异,理清土壤"碳汇（源）"功能,必须全面深入了解土壤碳转化对CO2的响应机理。然而,长期以来,关于CO2升高对土壤地上部碳输入的影响研究较多,而针对土壤有机碳对CO2升高的响应,尤其是响应的内在机制研究不足。本文主要依据近10年相关研究报道,在论述CO2浓度升高对土壤有机碳含量影响的基础上,从微生物学、土壤酶活性及与其他影响因素的耦合效应揭示CO2浓度升高对土壤有机碳转化内在机制的研究进展,并展望了未来相关研究的主要方向,旨在为将来农田土壤管理决策提供科学的理论依据。

引用

页码：1656 / 1663

页数：8

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