河南省乔木林碳储量动态变化及其碳汇经济价值估算

Dynamic Changes of Carbon Storage and Estimation of Carbon Sink Economic Value of High-forest in Henan Province

为了摸清乔木林在河南省森林碳储量中的地位,基于河南省第六次（2003年）和第七次（2008年）森林资源清查数据,对河南省乔木林的碳储量及其碳汇经济价值进行了估算.结果表明,河南省乔木林总碳储量由2003年的4 629.84万t增加到2008年的7 027.33万t,年均增加479.50万t,其平均碳密度略有下降,介于22.31～23.42 t/hm2,远小于全国和世界平均值.其中,阔叶林碳储量和平均碳密度均高于针叶林,5 a间其碳储量由4 144.02万t增加至6 497.47万t,年均增加470.69万t,尤其是杨树增加幅度最大,年均增长率达40.27％,成为碳储量最大的树种.与2003年相比,2008年河南省人工乔木林和天然乔木林碳储量均增加,其中人工乔木林增加幅度较大,其碳储量已占到全部乔木林碳储量的53.12％,其中杨树所占比重最大.2008年,河南省乔木林碳汇经济价值达到了191.64亿元,比2003年增加了65.38亿元,其中碳汇经济价值增长最快的是杨树,由2003年的25.72亿元增加到2008年的67.15亿元,其次为硬阔类和阔叶混.

In order to explore the status of high-forest in forest carbon storage of Henan province,according to the forest inventory data of Henan province in 2003 and 2008,the dynamic carbon storage and the carbon sink economic value of different forest types were assessed.The results showed that in Henan province,the total carbon storage of high-forest increased from 4 629.84 × 104 t to 7 027.33 × 104 t between 2003 and 2008,with an annual increment of about 479.50 × 104 t;the average carbon density decreased from 23.42 t/ha to 22.31 t/ha between 2003 and 2008,far less than the national and global average level.Among the forest types,the carbon storage and the average carbon density of broad-leaved forest were higher than those of coniferous forest.The carbon storage of broad-leaved forest increased from 4 144.02× 104 t to 6 497.47× 104 t during five years,the annual increment of which was about 470.69 × 104 t,the increase rate of poplars was largest,the annual increase rate of which was about 40.27 %.Compared to 2003,the carbon storage of plantation-forest and natural-forest all increased in 2008 ;the increase rate of plantationforest was larger,the carbon storage of which accounted for 53.12% of total carbon storage,the increase rate of carbon storage of poplars was largest.Finally,the carbon sink economic value of high-forest reached 19.164 billion yuan in 2008,increased by 6.538 billion yuan compared to that in 2003.The increase rate of carbon sink economic value of poplars was largest,the carbon sink economic value of poplars increased from 2.572 billion yuan to 6.715 billion yuan between 2003 and 2008,and following by hard broadleaf and broad-leaved mixed forest.