青海省森林乔木层碳储量现状及固碳潜力
收稿日期: 2018-03-13
网络出版日期: 2018-09-26
基金资助
中国科学院战略性先导科技专项(XDA05050207)
Current stocks and potential of carbon sequestration of the forest tree layer in Qinghai Province, China
Received date: 2018-03-13
Online published: 2018-09-26
Supported by
Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05050207)
为阐明青海省森林生态系统乔木层植被碳储量现状及其分布特征, 该研究利用240个标准样地实测的乔木数据, 估算出青海省森林生态系统不同林型处于不同龄级阶段的平均碳密度, 并结合青海省森林资源清查资料所提供的不同龄级的各林型面积, 估算了青海省森林生态系统乔木层的固碳现状、速率和潜力。结果表明: 1) 2011年青海省森林乔木层平均碳密度为76.54 Mg·hm -2, 总碳储量为27.38 Tg。云杉(Picea spp.)林、柏木(Cupressus funebris)林、桦木(Betula spp.)林、杨树(Populus spp.)林是青海地区的主要林型, 占青海省森林面积的96.23%, 占青海省乔木层碳储量的86.67%, 其中云杉林的碳储量(14.78 Tg)和碳密度(106.93 Mg·hm -2)最高。按龄级划分, 乔木层碳储量表现为过熟林>中龄林>成熟林>近熟林>幼龄林。2)青海省乔木层总碳储量从2003年的23.30 Tg增加到2011年的27.38 Tg, 年平均碳增量为0.51 Tg·a -1。乔木层固碳速率为1.06 Mg·hm -2·a -1, 其中柏木林的固碳速率最大(0.44 Mg·hm -2·a -1); 桦木林的固碳速率为负值(-1.06 Mg·hm -2·a -1)。3)青海省乔木层植被固碳潜力为8.50 Tg, 其中云杉林固碳潜力最高(3.40 Tg)。该研究结果表明青海省乔木层具有较大的固碳潜力, 若对现有森林资源进行合理管理和利用, 将会增加青海省森林的碳固存能力。
陈科宇, 字洪标, 阿的鲁骥, 胡雷, 王根绪, 王长庭 . 青海省森林乔木层碳储量现状及固碳潜力[J]. 植物生态学报, 2018 , 42(8) : 831 -840 . DOI: 10.17521/cjpe.2018.0058
Aims Our objective was to estimate the carbon storage in the forest tree layer in Qinghai Province, China.
Methods Based on forest resource inventory data and field investigation data, we estimated the carbon storage, sequestration rate and potentials in the forest tree layer in the Qinghai Province.
Important findings The carbon density and total carbon storage of forest tree layer in Qinghai Province was 76.54 Mg·hm -2 and 27.38 Tg, respectively, of which four forest types (Picea spp. forest, Cupressus funebris forest, Betula spp. forest and Populus spp. forest) accounted for 86.67% while their areas were 96.23% of total forest areas in Qinghai. The carbon density and carbon storage of Picea spp. forest was 106.93 Mg·hm -2 and 14.78 Tg, respectively, which was the largest among all forest types. The carbon storage of the forest tree layer at different stand ages followed the sequence of over-mature forest > middle-aged forest > mature forest > near-mature forest > young forest. In addition, the carbon storage of forest tree layer in the province increased from 23.30 Tg in 2003 to 27.38 Tg in 2011. The average annual growth of carbon and carbon sequestration rate were 0.51 Tg and 1.06 Mg·hm -2·a -1, respectively. The maximum and minimum of carbon sequestration rate were respectively found in Cupressus funebris forest (0.44 Mg·hm -2·a -1) and Betula spp. forest (-1.06 Mg·hm -2·a -1). The mean carbon sequestration potential reached 8.50 Tg in 2011, with the highest value found in Picea spp. forest (3.40 Tg). These findings suggested high carbon sequestration potential of forest tree layer in Qinghai Province. Therefore, the carbon storage in Qinghai Province could be increased through better forest management and utilization.
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