三江平原草甸湿地土壤有机碳矿化对C/N的响应

doi:10.13249/j.cnki.sgs.2009.05.773

地理科学 ›› 2009, Vol. 29 ›› Issue (5): 773-778.doi: 10.13249/j.cnki.sgs.2009.05.773

• 研究报道 • 上一篇

三江平原草甸湿地土壤有机碳矿化对C/N的响应

窦晶鑫^1,2, 刘景双¹, 王洋¹, 赵光影¹

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, 北京100039

收稿日期:2008-06-19 修回日期:2008-12-13 出版日期:2009-09-20 发布日期:2009-09-20
通讯作者: 刘景双,研究员。E-mai:lliujingshuang@mial.neigae.ac.cn E-mail:lliujingshuang@mial.neigae.ac.cn
作者简介:窦晶鑫(1982- ),女,黑龙江省伊春人,博士研究生,主要从事环境生态方面研究。E-mail:wywdyy2006@163.com.国家重点基础研究发展计划973计划(2004CB418507)资助。通讯作者: 刘景双,研究员。E-mail:liujingshuang@mial.neigae.ac.cn
基金资助:
中国科学院知识创新工程重要方向项目(KZCX2-YW-309)。

Effects of Amendment C/N Ratio on Soil Organic Carbon Mineralization of Meadow Marshes in Sanjiang Plain

DOU Jing-xin^1,2, LIU Jing-shuang¹, WANG Yang¹, ZHAO Guang-ying¹

1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin 130012;
2. Graduate University of Chinese Academy of Sciences, Beijing, 100049

Received:2008-06-19 Revised:2008-12-13 Online:2009-09-20 Published:2009-09-20

摘要/Abstract

摘要： 模拟研究了三江平原典型草甸小叶章湿地及人工林地土壤有机碳(SOC)矿化在4种C/N(Ⅰ: 9-10,Ⅱ:11-12,Ⅲ: 13-16,Ⅳ: 16-22)处理下的变化特征,分析了SOC矿化对C/N的响应。结果表明:在36天的培养期内,高C/N处理下两种土壤的SOC累积矿化量分别是低C/N时的2.78和2.68倍,两种土壤SOC矿化量对C/N变化的响应不存在显著差异;不同C/N处理下,两种土壤SOC的矿化速率均在前期(0~4天)较高,随着培养时间的延长逐渐降低,并趋于稳定;一级动力学方程能较好的描述两种土壤的SOC矿化动态,其C₀和C₀/SOC值均随C/N的增加而增加;回归分析表明,试验C/N(9-22)范围内湿草甸土和林地土的SOC累积矿化量及矿化速率分别与C/N呈显著的线性和二次曲线关系,C/N是影响湿地土壤有机碳富集程度的关键因素。

Abstract: An incubation expericment with typical Deyeuxia angustifolia meadow soil and artificial forest soil in the Sanjiang plain was conducted under different soil C/N (Ⅰ: 9-10, Ⅱ:11-12, Ⅲ: 13-16, Ⅳ: 16-22) to examine the responses of soil organic carbon (SOC) mineralization to C/N changes. The result showed that during the period of 36d incubation, the SOC accumulative losses of two kinds of soils under high C/N treatment were about 2.78 and 2.68 times as much as that under low C/N, respectively. SOC mineralization rates for both the two kinds of soils were higher in the first 4 days of incubation, and became stable as the time prolonged. The dynamics of SOC mineralization of two kinds of soil preferably followed the first-order kinetics, and the C₀ and C₀/SOC values increased exponentially with the increasing of C/N. The regression analysis also found that there were significant linear or conic relationships between the accumulative loss and mineralization rate of SOC and C/N, which explained that C/N was the key factor in affecting the sequestration of SOC in wetland.

中图分类号:

S158

窦晶鑫, 刘景双, 王洋, 赵光影. 三江平原草甸湿地土壤有机碳矿化对C/N的响应[J]. 地理科学, 2009, 29(5): 773-778.

DOU Jing-xin, LIU Jing-shuang, WANG Yang, ZHAO Guang-ying. Effects of Amendment C/N Ratio on Soil Organic Carbon Mineralization of Meadow Marshes in Sanjiang Plain[J]. SCIENTIA GEOGRAPHICA SINICA, 2009, 29(5): 773-778.

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三江平原草甸湿地土壤有机碳矿化对C/N的响应

Effects of Amendment C/N Ratio on Soil Organic Carbon Mineralization of Meadow Marshes in Sanjiang Plain

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