河北省森林固定CO_2的效益

Benefit of CO_2 Fixation by the Forests in Hebei Province

1 引言由于石油、煤炭用于燃烧及工业生产及对森林特别是热带雨林的滥砍滥伐,空气中的CO_2浓度正在逐年上升,受它以及其他温室效应气体的影响,到下个世纪中叶,地球的表面温度将提高1.5～4.5℃(IPCC)。全球变暖对陆地生态系统的影响及陆地生态系统的反作用是极其深奥的。陆地生态系统中的碳是空气中的4倍,自然植被迁移、生物生产力变化都将极大影响生物圈的碳循环,导致气候及环境的进一步变化,因而对陆地生态系统碳循环的研究及增加陆地生态系统的碳固定,减少温室效应气体的释放,就显得十分重要。

In order to study the effect of the forests in Hebei prov. on C cycle and the indirect benefit of afforestation from CO_2 fixation, the correlation betweenthe wood volume increment and the live biomass including foliage, branches, roots and non-tree biomassin forests was developed. Based on this correlation and data of wood volume increment, the area of the man-made forests, and increment of forest area, the amount of CO_2 fixed by forest in Hebei Province was calculated. In addition, the transfer of C by forest logging, thinning and forest treatment and was analysed, and the loss of C from decomposition after forest logging was calculated. The total C fixation of forests in Hebei Province amound to 13, 545,185 ton of CO_2. Based on calculation of the investment of afforestation for C storage, the annual benefits of forest from C sink equatetd to 3. 405 billion RMB $.