华南农业大学学报2016，Vol.37Issue(6)：84-90,7.DOI:10.7671/j.issn.1001-411X.2016.06.013
马占相思人工林土壤温室气体排放日变化规律研究
Diurnal variations in greenhouse gas emissions from Acacia mangium plantation soil
摘要
Abstract
Objective] In order to study the diurnal variations in fluxes of greenhouse gases including CO2 , CH4 and N2 O from Acacia mangium plantation soil, and determine the optimal observation time.[Method]The emission fluxes of CO2 , CH4 and N2 O from A.mangium plantation soil in southern China were continually observed using static-chamber and gas chromatograph.[Result]The fluxes of CO2 , CH4 and N2 O from A.mangium plantation soil had clear diurnal variations.The A.mangium plantation soil was a source of CO2 and N2 O and a sink of CH4 .The daily fluxes of CO2 , N2 O and CH4 ranged from 401.33 to 555.59 mg · m-2 · h-1 , 24.50 to 34.72 μg · m-2 · h-1 and -10.96 to -41.88μg· m-2 · h-1 respectively.The fluxes of CO2 or CH4 from soil surface had highly significant ( P <0.01 ) or significant ( P<0.05) positive correlations with soil temperature at 5 cm depth, while CH4 flux from soil surface was not significantly correlated with soil temperature.[Conclusion]Based on the analysis of the correction coefficients of three greenhouse gases and manipulability of sampling, the optimal time for collection and observation of these three greenhouse gases from A.mangium plantation in southern China during rainy seasons is around 09:00.关键词
马占相思/温室气体/日变化/观测时间/人工林土壤Key words
Acacia mangium/greenhouse gas/diurnal variation/observation time/plantation soil分类
农业科技引用本文复制引用
贾朋,魏龙,王燕,刘珊,高常军,周平,李吉跃..马占相思人工林土壤温室气体排放日变化规律研究[J].华南农业大学学报,2016,37(6):84-90,7.基金项目
广州市森林碳汇计量与监测项目 （）
