【摘要】 森林是陆地生态系统的主要组成部分,在全球碳循环中起着十分重要的作用。利用1990─2010年间5期的森林资源清查资料,采用森林植被生物量换算因子连续法,估算了辽宁省森林植被碳储量和碳密度,并分析其动态变化。结果表明:在1990─2010年间,辽宁省森林面积增加了17.05×105 hm2,年均增长率为1.70%。辽宁省5次(1989─1993、1994─1998、1999─2003、2004─2008、2009─2013年)森林资源清查期的植被碳储量分别是87.10、100.78、108.04、122.06、141.80 Tg,年均增长率为2.47%,这说明辽宁省森林起着碳汇作用。乔木林、疏林和灌木林、经济林碳储量分别增加50.90、2.97、0.83Tg,碳储量平均年增加量分别为2.55、0.15、0.04 Tg·a-1。在不同植被类型中,阔叶林的碳储量和碳密度均大于针叶林,其中,栎类、杨树及阔叶混交林是阔叶林碳储量的主要贡献者,而在针叶林中,落叶松、油松占主导地位。在不同龄级的乔木林中,幼、中龄林碳储量所占比重大。在现阶段(2010年),辽宁省乔木林碳储量分别为121.49 Tg,碳密度为31.12 Mg·hm-2。幼龄林和中龄林的面积占总面积的73.38%,碳储量占总碳储量的60.12%,其碳密度仅为19.52和36.18 Mg·hm-2,远低于成熟林的碳密度(54.32 Mg·hm-2)。可知现阶段辽宁省森林具有幼龄林和中龄林面积大、林龄小和平均碳密度低的特点,因此随着幼龄林和中龄林的碳密度和碳储量的不断增长,未来辽宁省森林植被的碳汇功能将进一步增强。更多还原

【Abstract】 Forest is the first major form of terrestrial ecosystem and plays an important role in global carbon cycle. Based on the national forest inventory data from 1990 to 2010, the carbon storage and density of forest vegetation were estimated and their dynamic changes during this period were analyzed in Liaoning province using the variable biomass expansion factor(BEF) method. The results showed that the forest area of Liaoning province increased 17.05×105 hm2 and an average annual growth rate was 1.70% from 1990 to 2010. The total carbon storage of forest vegetation on Liaoning province in the five periods(1989─1993, 1994─1998, 1999─2003, 2004─2008 and 2009─2013) was 87.10, 100.78, 108.04, 122.06 and 141.80 Tg, respectively, and the average annual growth rate was 2.47%. This indicated that forest ecosystem in Liaoning province played a carbon sink role in that period. During the study period, trees, open forest and shrubwood, and economic forests carbon storage increased 50.90、2.97 and 0.83 Tg, respectively,and their average annual increases of carbon storage were 2.55、0.15 and 0.04 Tg·a-1, respectively. The carbon storage and density of broad-leaved forests were higher than those of conifer forests. The dominant species such as Quercus, Populus spp and mixed broad-leaf forest are the main contributors to carbon storage in broad-leaved forests; Larix and Pinu stabulaeformis have played a dominant role in conifer forests. The young- and middle-aged forests accounted for a large proportion of total carbon in Liaoning province. In 2010, the carbon storage and density of trees were 121.49 Tg and 31.12 Mg·hm-2, respectively. The young- and middle-aged forests accounts of 73.38% of the total trees area, and 60.12% of the total carbon storage. The average carbon density of young- and middle-aged forests were 19.52 and 36.18 Mg·hm-2, respectively, and were smaller than mature forests(54.32 Mg·hm-2). Since the young- and middle-aged forests area is large and their carbon density is low, the carbon storage and carbon density would increase in the future. Therefore, Liaoning province forests would have a huge potential for carbon sink.更多还原