| 中国寒温带不同林龄白桦林碳储量及分配特征 |
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| 引用本文： | 魏红,满秀玲. 中国寒温带不同林龄白桦林碳储量及分配特征[J]. 植物生态学报, 2019, 43(10): 843-852. DOI: 10.17521/cjpe.2019.0127 |
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| 作者姓名： | 魏红 满秀玲 |
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| 作者单位： | 东北林业大学林学院, 东北林业大学森林生态系统可持续经营教育部重点实验室, 哈尔滨 150040 |
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| 基金项目： | 中央高校基本科研业务费专项资金项目(2572018AA02);国家自然科学基金(31770488) |
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| 摘 要： | 为了解中国寒温带地区不同林龄白桦林生态系统碳储量及固碳能力, 在样地调查基础上, 以大兴安岭地区25、40与61年白桦(Betula platyphylla)林生态系统为研究对象, 对其乔木层、林下地被物层(灌木层、草本层、凋落物层)、土壤层(0-100 cm)碳储量与分配特征进行调查研究。结果表明白桦林乔木层各器官碳含量在440.7-506.7 g·kg -1之间, 各器官碳含量随着林龄的增长而降低; 灌木层、草本层碳含量随林龄的增加呈先降后升的变化趋势; 凋落物层碳含量随林龄增加而降低; 土壤层(0-100 cm)碳含量随林龄增加而显著升高, 随着土层深度的增加而降低。白桦林生态系统各层次碳储量均随林龄的增加而明显升高。25、40与61年白桦林乔木层碳储量分别为11.9、19.1和34.2 t·hm -2, 各器官碳储量大小顺序表现为树干>树根>树枝>树叶, 树干碳储量分配比例随林龄增加而升高。25、40与61年白桦林生态系统碳储量分别为77.4、180.9和271.4 t·hm -2, 其中土壤层占生态系统总碳储量的81.6%、87.7%和85.9%, 是白桦林生态系统的主要碳库。随林龄增加, 白桦林年净生产力(2.0-4.4 t·hm -2·a -1)、年净固碳量(1.0-2.1 t·hm -2·a -1)均出现增长, 老龄白桦林仍具有较强的碳汇作用。
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| 关 键 词： | 白桦林 碳储量 固碳能力 碳含量 林龄 |
| 收稿时间： | 2019-05-28 |
Carbon storage and its allocation in Betula platyphylla forests of different ages in cold temperate zone of China |
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| WEI Hong,MAN Xiu-Ling. Carbon storage and its allocation in Betula platyphylla forests of different ages in cold temperate zone of China[J]. Acta Phytoecologica Sinica, 2019, 43(10): 843-852. DOI: 10.17521/cjpe.2019.0127 |
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| Authors: | WEI Hong MAN Xiu-Ling |
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| Affiliation: | School of Forestry, Northeast Forestry University, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin 150040, China |
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| Abstract: | Aims The objective of this study was to estimate the carbon storage and its allocation in the Betula platyphylla forests of three different ages (25, 40, 61-year-old) in the cold temperate zone, NE China. Methods Through analyzing the field data, we estimated the carbon storage and sequestration rates of tree, understory layer (shrub layer, herb layer, litter layer) and soil layer (0-100 cm) of the 25, 40 and 61-year-old Betula platyphylla ecosystems in the north section of the Da Hinggan Ling Mountains. Important findings The results showed that the carbon content of each organ in the tree layer of the forests ranged from 440.7 to 506.7 g·kg-1, that decreased as the forest age increases. Carbon content in the shrub and herb layers decreased first and then increased as the forest aged, while that in the litter layer decreased with the increase of forest age. The carbon content in soil layer (0-100 cm) increased significantly with the forest age (p < 0.05), and decreased as soil drought intensified. The carbon storage of B. platyphylla ecosystem at all levels increased significantly with the increase of forest age. The carbon storage of tree layer in the forests of 25, 40 and 61-year-old were 11.9, 19.1 and 34.2 t·hm-2, respectively. The carbon storage of the organs follow the order of: trunk > root > branch > leaf, and the allocation ratio of trunk carbon increased as the forest aged. The carbon storage in the Betula platyphylla forest ecosystems of 25, 40 and 61-year-old were 77.4, 180.9 and 271.4 t·hm -2, respectively. Soil layer, the main carbon pool of the ecosystems, accounted for 81.6%, 87.7% and 85.9% of the total carbon storage. The annual net productivity (2.0-4.4 t·hm -2·a -1) and annual net carbon sequestration (1.0-2.1 t·hm -2·a -1) of the forests increased with the age increase of the forest, and the old-growth B. platyphylla forests hold a strong carbon sequestration capacity. |
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| Keywords: | Betula platyphylla forests')" >Betula platyphylla forests, carbon storage, carbon sequestration, carbon content, forest age |
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