Carbon dioxide fluxes from soil respiration and woody debris decomposition in boreal forests A STUDY ON THE MEASUREMENT OF CO 2 EMISSION FROM THE SOIL OF THE SIMULATED Quercus Liaotungensis FOREST SAMPLED FROM BEIJING MOUNTAIN AREAS Methods for the determination of CO2 flux from non-photosynthetic organs of trees and their influences on the results Modeling diurnal variations of CO2 flux over winter wheat with a coupled model of photosynthesis and evapotranspiration Study on the CO2 grads and flux in near canopy layer of tropical mountain rainforest at Jianfengling, Hainan Island In Situ Measurements of CO2 Flux in Grassland Ecosystem by Closed Chamber Technique CO2 source/sink and its variation of artificial mixed forest in subtropical red soil hilly area