摘要
【目的】乔木林生物质碳汇是影响森林碳汇的重要组成部分,是一种自然的气候解决方案,在全球气候变化大背景下,森林的固碳潜力一直被广泛关注,本文以北京市为例,分析不同的林业活动对乔木碳储量的影响。【方法】采用北京市森林资源设计调查数据,利用IPCC材积源-生物量法估算北京市乔木林碳储量,分析了2009-2014年北京市在森林转化、造林以及森林经营3种自然方案下碳储量的变化情况。【结果】(1)2009-2014年北京市森林面积净增长8.35×10^(4)hm^(2),碳储量净增量约1.45×10^(9)kg,年均碳固持量为0.29×10^(9)kg/a。(2)2014年北京市人工林总碳储量高于天然林,且碳密度高于天然林。当前北京市森林龄级结构偏低龄化,随着森林的自然生长,仍有较大的碳固持潜力。在各个优势树种(组)中,人工杨树林的固碳效率尤为突出,远远高于其他优势树种。(3)山地森林活动强度较小,森林经营区域占比较大,城市森林变化剧烈,受造林与森林转化等措施影响较大。2009-2014年北京市由于森林转化为其他土地造成了1.06×10^(9)kg的碳损失,造林带来了2.10×10^(9)kg的碳固持,森林经营过程中有1.62×10^(9)kg的碳固持与1.21×10^(9)kg的碳损失,森林经营活动的总碳储量净增量0.41×10^(9)kg,避免森林转化可以带来1.17×10^(9)kg的碳汇。【结论】增加乔木林的固碳能力是应对气候变化的重要手段,避免森林转化可以凭借较小的森林面积贡献较大的碳汇,是一种低成本且效果显著的增汇方案。
[Objective]Carbon sequestration of arbor forest biomass is an important component affecting forest carbon sink,and is a natural based climate solution.In the context of global climate change,the carbon sequestration potential of forests has been widely concerned.This paper takes Beijing as an example to analyze the influence of different forestry activities on forest carbon storage.[Method]Based on the survey data of forest resource design in Beijing,the carbon storage of tree layer forest in Beijing was estimated by IPCC volume-biomass method.The change of carbon storage under three natural schemes of deforestation,afforestation and forest management in Beijing from 2009 to 2014 was analyzed.[Result](1)From 2009 to2014 in Beijing,the net increase of forest area in Beijing was 8.35×10^(4)ha,the net increase of carbon storage was about 1.45×10^(9)kg,and the average annual carbon sequestration was 0.29×10^(9)kg/year.(2)In2014,the total carbon storage of artificial forest in Beijing was higher than that of natural forest,and the carbon density was higher than that of natural forest.The forest age structure in Beijing was getting older and with the natural growth of forest,there was still a great potential for carbon sequestration.Among the dominant tree species(groups),the carbon sequestration efficiency of artificial poplar forest was particularly prominent,which was much higher than that of other dominant tree species.(3)The intensity of mountain forest activity was small,the forest management area accounted for a large proportion,the urban forest changed violently,and was greatly affected by afforestation and deforestation.From 2009 to 2014 in Beijing,deforestation into other lands caused a carbon loss of 1.06×10^(9)kg;afforestation caused a carbon sequestration of 2.10×10^(9)kg;there was a carbon sequestration of 1.62×10^(9)kg and a carbon loss of 1.21×10^(9)kg in forest management;the net increment of total carbon storage was 0.41×10^(9)kg.Avoiding deforestation can bring 1.17×10^(9)kg carbon sink.[Con
作者
李宸宇
朱建华
张峰
李奇
田宇
肖文发
陈维强
Li Chenyu;Zhu Jianhua;Zhang Feng;Li Qi;Tian Yu;Xiao Wenfa;Chen Weiqiang(Institute of Forest Ecological Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Beijing Forestry Carbon Administration,Beijing 100013,China;Beijing Glorian Climate Technology Consulting Co.Ltd,Beijing 100029,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2021年第6期13-22,共10页
Journal of Beijing Forestry University
基金
北京市自然科学基金项目(5192020)。
关键词
森林碳储量
避免森林转化
造林
森林经营
forest carbon storage
avoiding deforestation
afforestation
forest management
