摘要
利用20世纪70年代至21世纪初35年间的七次全国森林资源清查数据,采用分树种、分龄组的生物量—蓄积量拟合模型法,估算第一至第七次森林资源清查期间中国乔木林碳储量,并分析其动态变化过程,在此基础上分析造林对森林植被碳储量的影响。结果表明,截止2008年我国乔木林碳储量已达60.9亿t,东北地区和西南地区的森林植被碳储量较大,乔木林碳储量自第二次清查起呈稳步增长趋势。第七次清查结束,乔木林碳密度比20世纪70年代初增长了3.55 t/hm2,人工林碳储量达10.3亿t,占乔木林总量近17%,造林对森林生态系统碳汇贡献显著。各龄组人工林面积、蓄积量以及碳储量亦呈现稳步增长趋势。总体来讲,我国森林生态系统的固碳量在稳步增加,幼龄林和中龄林的固碳潜力巨大,乔木林的碳汇效益正在进一步提高和增强。
In this paper, the storage of arboreal forest carbon in China from the first to the seventh national forest inventory was estimated based on the forest inventory data from 1970s to the beginning of the 21 century and its dynamic change was analyzed by u- sing age-based volume-to-biomass method. The authors further analyzed the impact of afforestation on forest ecosystem carbon storage. The result showed that, by 2008, the arbor forest carbon storage in China has reached 6. 09 PgC. The larger carbon storage was pri- marily found in the northeast and southwest regions of China. Since the second forest inventory, the forest vegetation carbon storage has been steadily rising. By the seventh forest inventory, the arbor forest carbon density increased by 3.55 Mg/hm^2 than the early 1970＇s, and the carbon storage of plantations was 1.03 PgC, accounting for nearly 17% of total arbor forest carbon. Afforestation con- tributed significantly to the carbon sink. The area, volume and biomass of each age-classes plantation also increased steadily. Gener- ally speaking, the carbon storage of forest ecosystem in China is steadily increasing. The potential of carbon sequestration of young and immature forests is very huge, and the carbon benefits of arbor forest is increasing and enhanced.
出处
《森林工程》
2015年第4期50-55,共6页
Forest Engineering
基金
国家科技支撑计划(2013BAC03B01)
高分辨率对地观测系统重大专项(No.00-Y30B15-9001-14/16)
中国科学院西部行动计划项目(KZCX2-XB3-08-01)
关键词
乔木林
人工林
碳储量
碳密度
arboreal forest
plantation
carbon storage
carbon density
