| 草原土壤的碳氮含量及其与温室气体通量的相关性 |
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| 引用本文： | 耿远波,章申,董云社,孟维奇,齐玉春,陈佐忠,王艳芬.草原土壤的碳氮含量及其与温室气体通量的相关性[J].地理学报,2001,56(1):44-53. |
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| 作者姓名： | 耿远波 章申 董云社 孟维奇 齐玉春 陈佐忠 王艳芬 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所 环境生物地球化学开放实验室，北京 100101
2. 中国科学院植物研究所，北京 100093 |
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| 基金项目： | “九五”国家重大基础研究项目!( 95-2 2 -0 2 -0 1 )，国家自然科学基金资助项目!( 49971 0 0 5)&& |
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| 摘 要： | 通过采样分析研究内蒙古锡林流域温带草原土壤有机碳及全N的含量特征,探讨它们的含量与温室气体CO2、N2O、CH4通量的相关性。结果表明：沿470－150mm年降水梯度线，土壤表层（0－20cm）有机碳含量从2．38％递减到1．23％，全N含量从0．218％递减到0．136％，而且放牧和开垦都有使有机碳及全N含量降低的趋势；CO2通量与有机碳含量、全N含量、C／N及N2O通量显著相关，N2O通量与有机碳含量、C／N及CO2通量显著相关，且CO2和N2O的通量都有沿降水梯度递减的趋势；CH4通量与有机碳含量、全N含量、C／N、CO2通量及N2O通量都没有显著相关性。
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| 关 键 词： | 有机碳 温室气体通量 全氮含量 草原土壤 相关性 |
| 文章编号： | 0375-5444(2001)01-0044-10 |
| 修稿时间： | 2000年4月18日 |
The Content of Soil Organic Carbon and Total Nitrogen and Correl Ativity between Their Content and Fluxes of CO2, N2O and CH4 in Xilin River Basin Steppe |
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| GENG Yuan bo,ZHANG Shen,DONG Yun she,MENG Wei qi,QI Yu chun,CHEN Zuo zhong,WANG Yan fen.The Content of Soil Organic Carbon and Total Nitrogen and Correl Ativity between Their Content and Fluxes of CO2, N2O and CH4 in Xilin River Basin Steppe[J].Acta Geographica Sinica,2001,56(1):44-53. |
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| Authors: | GENG Yuan bo ZHANG Shen DONG Yun she MENG Wei qi QI Yu chun CHEN Zuo zhong WANG Yan fen |
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| Abstract: | In the paper, the content characteristics of soil organic carbon and total nitrogen were studied, and correlativity between the content of soil organic carbon and total nitrogen and the fluxes of greenhouse gases CO 2, N 2O and CH 4 were analyzed. All the samples were taken from temperate steppe of Xilin River Basin in Inner Mongolia of China. The results showed that the content of organic carbon range in soil surface layer (0~20 cm) decreased successively from 2 38% to 1 23% and the content of total nitrogen from 0 218% to 0 136% along the precipitation gradient from 470 mm to 150 mm. The contents of the soil organic carbon and total nitrogen had the decreasing trend due to grazing and cultivation. The fluxes of CO 2 were significantly positively correlated with the content of the soil organic carbon, the content of soil total nitrogen, C/N ratio and the fluxes of N 2O. The fluxes of N 2O were significantly positively correlated with the content of the soil organic carbon, soil C/N ratio soil and the fluxes of CO 2. The fluxes of both CO 2 and N 2O had the successively decreasing trend along the precipitation gradient. The fluxes of CH 4 had no significant correlativity with the content of soil organic carbon, the content of soil total nitrogen, C/N ratio in soil, the fluxes of CO 2 and the fluxes of N 2O. |
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| Keywords: | soil organic carbon soil total nitrogen fluxes of greenhouse gases content characteristic correlativi |
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