沼泽湿地垦殖对土壤碳动态的影响

doi:10.13249/j.cnki.sgs.2006.03.340

地理科学 ›› 2006, Vol. 26 ›› Issue (3): 340-344.doi: 10.13249/j.cnki.sgs.2006.03.340

沼泽湿地垦殖对土壤碳动态的影响

张金波^1,2, 宋长春¹, 杨文燕^1,2

1. 中国科学院东北地理与农业生态研究所, 吉林长春 130012;
2. 中国科学院研究生院, 北京 100049

收稿日期:2005-02-27 修回日期:2005-06-22 出版日期:2006-05-20 发布日期:2006-05-20
基金资助:
国家自然科学基金项目(40471124)、中国科学院知识创新工程重大项目(KZCX1-SW-01、KZCX3-SW-332)资助。

Cultivation Effects on Soil Organic Carbon Dynamics in Sanjiang Plain, Northeast China

ZHANG Jin-Bo^1,2, SONG Chang-Chun¹, YANG Wen-Yan^1,2

1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130012;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049

Received:2005-02-27 Revised:2005-06-22 Online:2006-05-20 Published:2006-05-20

摘要/Abstract

摘要： 在中国科学院三江平原湿地生态试验站选取相邻的、土壤类型相同的小叶章沼泽化草甸以及不同开垦殖年限的已垦湿地农田,综合运用多种微生物指标,全面地评价沼泽湿地垦殖后土壤有机碳的动态。结果表明,沼泽湿地垦殖初期(1~3年),土壤微生物量碳(MBC)、微生物商以及基础呼吸(BR)都迅速降低,而代谢商(qCO₂)、PR/BR和PR/MBC比值却不断升高。表明湿地垦殖后,有机碳的可利用性下降,微生物对碳源的利用效率降低,造成土壤有机碳的大量损失。各种微生物指标之间有密切的相关关系,综合这些微生物指标能够全面地、准确地评价沼泽湿地垦殖后土壤有机碳的动态。

关键词: 微生物量碳, 微生物商, 代谢商, 基础呼吸

Abstract: We selected adjacent Deyeuxia angustifolia meadow and farmland cultivated 1,3,5,9,15,25 and 35 years, to study cultivation effects on soil biological properties and organic matter dynamics in the Sanjiang Plain in Northeast China.The results showed that cultivation resulted in decrease in the microbial biomass carbon (MBC), microbial quotient(MQ), and basal respiration (BR).While, metabolized quotient (qCO₂), potential respiration/basal respiration(PR/BR), and PR/MBC ratios obviously increased with cultivation.Converting wetland soil into agriculture soil resulted in significant decline in carbon availability and efficiency of microbial populations in conserving C.There are clear relationships between soil microbial properties.The method evaluating more parameters simultaneously can provide complete and true information about the soil microorganisms and carbon dynamics.

Key words: microbial biomass carbon, microbial quotient, metabolic quotient, basal respiration

中图分类号:

S154.1

张金波, 宋长春, 杨文燕. 沼泽湿地垦殖对土壤碳动态的影响[J]. 地理科学, 2006, 26(3): 340-344.

ZHANG Jin-Bo, SONG Chang-Chun, YANG Wen-Yan. Cultivation Effects on Soil Organic Carbon Dynamics in Sanjiang Plain, Northeast China[J]. SCIENTIA GEOGRAPHICA SINICA, 2006, 26(3): 340-344.

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沼泽湿地垦殖对土壤碳动态的影响

Cultivation Effects on Soil Organic Carbon Dynamics in Sanjiang Plain, Northeast China

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