生态环境学报2012，Vol.21Issue(1)：49-54,6.
淮河流域农田碳收支特征及影响因素分析
The farmland carbon balance characteristics and its influencing factors of the Huaihe River basin
摘要
Abstract
Using the open-path eddy covariance system to Huaihe River basin farmland for turbulence characteristics on a four-year continuous monitoring, For the study of major crops of wheat and rice to analysis and processing the CO2 flux data. The results show that: the farmland diurnal variation of CO2 flux changed significantly with the seasons, the magnitude of changes in spring and summer was significantly greater than the autumn and winter; The diurnal variation of CO2 flux from paddy fields showed a single peak in Huaihe River Basin from 2007-2010, it obviously a carbon converged on daytime; The daily maximum total absorption in 2007, can up to 16.12 mg-m"2-s'', the minimum in 2009, is 11.16 mgm'2s''; In the jointing stage of rice, vertical wind speed(W), latent heat flux(LE), sensible heat flux(//), Photosynthetic active radiation(PAR), net radiation(Rn)and CO2 flux have a significant negative correlation; Through principal component analysis by indicators, the new composite indicator F--0.36ZX1 + 0.42ZX2 +0.42 ZX3 +0.42 ZX4 +0.39 ZX5 +0.42 ZX6+0.13 ZX7, and the time in 13:00 is the calculated maximum carbon sinks, 24:00 is the largest carbon source.关键词
淮河流域/CO2通量/相关性/主成分分析Key words
Huaihe River basin/CO2 flux/correlation/principal component analysis分类
农业科技引用本文复制引用
叶飞,严平,钱坤,陈琛,刘和俊..淮河流域农田碳收支特征及影响因素分析[J].生态环境学报,2012,21(1):49-54,6.基金项目
利用全球环境基金(GEF)赠款"适应气候变化农业开发"项目(TF092393-CN) （GEF）
