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森林固定CO2的作用日益受到重视,如何计算分布很广的杨树人工林的碳汇量成为一个实际问题。作者设计和营造了各种密度的杨树试验林,设置了固定标准地,对地上、地下生物量和材积生长量进行了测定。作者将杨树人工林地上、地下生物量的数据,换算为固碳量和CO2固定量,再根据相应的材积算出材积的CO2换算系数为1.27。计算杨树人工林碳汇时用此系数换算,可能比常用的粗略换算系数1.83更准确。
The role of CO2 fixation in forests is gaining more and more attention. How to calculate the carbon sinks of widely distributed poplar plantations has become a practical issue. The authors designed and constructed poplar experimental forests of various densities and set fixed standards to determine the above-ground biomass and volumetric growth. The authors convert the above and belowground biomass data of poplar plantations into carbon sequestration and CO2 fixation, and then calculate the CO2 conversion factor of the volume based on the corresponding volume to 1.27. Calculating poplar plantation carbon sinks with this factor conversion may be more accurate than the commonly used crude conversion factor of 1.83.