Breakthrough of underground carbon cycle in the forest ecosystems using carbon stable isotope labeling technique

为了更好地了解森林生态系统的地下碳循环，2011年对一棵锯缘栎树进行了7次13C标记。用可调谐半导体激光吸收光谱分析了树干呼吸~(13)CO_2后，粗根和细根的时间滞后和碳转移速度。季节相关性表现为夏季时滞较短、速度较高，秋季时滞较长、速度较低。

To better understanding of belowground carbon cycle in the forest ecosystems, 13C labeling method was applied to a Quercus serrata tree in the field 7 times in 2011. Respired 13CO2 from trunks, coarse and fine root was tracked using tunable diode laser absorption spectrometry to determine time lags and the velocity of carbon transfer. The seasonal dependencies were observed with shorter time-lags and higher velocity in the summer and longer time-lag and lower velocity in the autumn.