Correlations among CO_2,CH_4,and N_2O concentrations in soil profiles in central Guizhou Karst area

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Publication Date

April 2010

Volume Number

29

Issue Number

4

Abstract

From June 2006 to May 2007,the monthly CO2,CH4,and N2O concentrations in soil profiles in central Guizhou Karst area were measured,with their spatiotemporal correlations analyzed. The CO2 and N2O concentrations in the soil profiles were 0.35-35.3 ml·L-1 and 0.31-5.31 μl·L-1,respectively,being higher in summer and autumn than in winter and spring,and the CH4 concentration was 0.1-4.7 μl·L-1,with no significant difference among seasons.With the increase of soil depth,the CO2 and N2O concentrations increased first and then decreased or tended to be stable,while CH4 had an inverse trend unlike CO2 and N2O.The spatiotemporal distribution of CO2 in the soil profiles was significantly positively correlated with that of N2O,but negatively correlated with that of CH4;while the spatiotemporal variations of CH4 and N2O were negatively correlated,being significant in Huaxi grassland,Qingzhen hardwood forest,and forest park Pinus massoniana forest and hardwood forest.

Document Type

Article

Language

Chinese

Identifier

SFS0072047_00001

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