植物生态学报 ›› 2018, Vol. 42 ›› Issue (8): 831-840.doi: 10.17521/cjpe.2018.0058

• 研究论文 • 上一篇    下一篇

青海省森林乔木层碳储量现状及固碳潜力

陈科宇1,字洪标1,阿的鲁骥1,胡雷1,王根绪2,王长庭1,*()   

  1. 1 西南民族大学青藏高原研究院, 成都 610041
    2 中国科学院成都山地灾害与环境研究所中国科学院山地表生过程与生态调控重点实验室, 成都 610041
  • 收稿日期:2018-03-13 出版日期:2018-08-20 发布日期:2018-09-26
  • 通讯作者: 王长庭 E-mail:wangct6@163.com
  • 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

CHEN Ke-Yu1,ZI Hong-Biao1,ADE Luji1,HU Lei1,WANG Gen-Xu2,WANG Chang-Ting1,*()   

  1. 1 Institute of Qinghai-Tibetan Plateau, Southwest University for Nationalities, Chengdu 610041, China
    2 Key Laboratory of Mountain Surface Processes and Ecological Regulation of Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2018-03-13 Online:2018-08-20 Published:2018-09-26
  • Contact: Chang-Ting WANG E-mail:wangct6@163.com
  • Supported by:
    Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05050207)

摘要:

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。

关键词: 碳储量, 固碳速率, 固碳潜力, 乔木层, 青海省

Abstract:
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.

Key words: carbon storage, carbon sequestration rate, carbon sequestration potential, arbor, Qinghai Province