盐土和碱土土壤无机CO2通量的分离

干旱区地理 ›› 2013, Vol. 36 ›› Issue (4): 655-661.

盐土和碱土土壤无机CO₂通量的分离

王忠媛^1，2，王玉刚¹，谢江波^1,2，李彦¹

1 中国科学院新疆生态与地理研究所，荒漠与绿洲生态国家重点实验室，新疆乌鲁木齐 830011；2 中国科学院大学，北京 100049

收稿日期:2012-11-28 修回日期:2013-01-07 出版日期:2013-07-25
通讯作者: 李彦. 研究员，博士生导师. Email：liyan@ms.xjb.ac.cn
作者简介:王忠媛（1984-），女，新疆阿勒泰人，博士研究生，主要从事盐碱土土壤呼吸研究. Email：wangzhongyuan2014@163.com
基金资助:
国家重点基础研究发展计划973项目（2009CB825102）；国家国际科技合作计划“（2010DFA92720-05）”

Differentiating the soil inorganic CO₂ flux of saline and alkaline soils

WANG Zhong-yuan^1，2，WANG Yu-gang¹，XIE Jiang-bo^1，2，LI Yan¹

1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011,Xinjiang, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2012-11-28 Revised:2013-01-07 Online:2013-07-25

摘要/Abstract

摘要： 干旱区盐碱土无机CO₂通量是一个崭新、独特的科学现象，打破了土壤CO₂通量完全来自于有机源的假设；然而，盐碱土无机CO₂通量在土壤CO₂通量和全球碳循环中的重要性还缺乏分离和量化的依据，因而存在很大的不确定性。通过采用高压灭菌的方法，将盐土和碱土的土壤无机CO₂通量从土壤CO₂通量中分离。结果表明：高压灭菌方法并不改变土壤的理化性质，并通过土壤有机CO₂通量与温度的关系验证了分离方法的有效性，从而为盐碱土无机CO₂通量的分离、量化和评估提供了一个可靠有效的方法。盐碱土的土壤无机CO₂通量是土壤CO₂通量的重要组分，土壤无机CO₂通量的分离对精确解析干旱区盐碱土生态系统的碳循环是必要的；对盐碱土土壤无机CO₂通量的研究，将促进对干旱区盐碱土土壤CO₂通量和全球碳循环的理解。

关键词: 土壤CO₂通量, 土壤无机CO₂通量, 盐土, 碱土, 高压灭菌

Abstract: The soil inorganic CO₂ flux in saline/alkaline soil of the arid land is a unique and brand-new phenomenon，which breaks the assumption that soil CO₂ fluxes are purely organic in origin. However，due to lack differentiation standard and quantitative data，the significance of soil inorganic CO2 flux to soil CO₂ flux and global carbon cycle is still uncertainty. The experiment was carried out from August to October in 2009 at the Fukang Station of Desert Ecology. To determine the potential contribution of soil inorganic CO₂ flux to total soil CO₂ flux，the soil inorganic CO₂ flux was differentiated by sterilization treatment（121 ℃，24 h） with pressure steam chamber. The results showed that soil properties had little change before and after sterilization treatment. Having its differentiation effect validated by the relationship between soil organic CO₂ flux and temperature, it showed that the sterilization was a reliable and valid method to differentiate soil inorganic CO₂ flux. The effect of soil inorganic CO₂ flux was larger than that of soil organic CO₂ flux，which could dominate the saline/alkaline soil CO₂ flux both in direction and magnitude. As a significant component of soil CO₂ flux in saline/alkaline soil，the differentiation and quantification of soil inorganic CO₂ flux are necessary to advance understanding of carbon cycle in arid land. Therefore, the non-negligible role of soil inorganic CO₂ flux as potential contribution to the arid land ecosystem carbon cycle requires further investigation towards a better understanding of arid land soil CO₂ flux and global soil carbon cycle.

Key words: soil CO₂ flux, oil inorganic CO₂ flux, saline soil, alkaline soil, pressure-steaming sterilization

中图分类号:

S154.1

王忠媛，王玉刚，谢江波，李彦. 盐土和碱土土壤无机CO₂通量的分离[J]. 干旱区地理, 2013, 36(4): 655-661.

WANG Zhong-yuan，WANG Yu-gang，XIE Jiang-bo，LI Yan. Differentiating the soil inorganic CO₂ flux of saline and alkaline soils[J]. , 2013, 36(4): 655-661.

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盐土和碱土土壤无机CO₂通量的分离

Differentiating the soil inorganic CO₂ flux of saline and alkaline soils

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