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Dynamic and allocation of recently assimilated carbon in Korean pine (Pinus koraiensis) and birch (Betula platyphylla) in a temperate forest

文献类型: 外文期刊

作者: Chang, Qing 1 ; Xu, Wenhua 3 ; Peng, Bo 4 ; Jiang, Ping 4 ; Li, Shanlong 3 ; Wang, Chao 4 ; Bai, Edith 1 ;

作者机构: 1.Northeast Normal Univ, Minist Educ, Key Lab Geog Proc & Ecol Secur Changbai Mt, Changchun 130024, Peoples R China

2.Northeast Normal Univ, Sch Geog Sci, Changchun 130024, Peoples R China

3.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Changchun 130033, Peoples R China

4.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China

5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China

6.Northeast Normal Univ, Changchun 130024, Peoples R China

关键词: C-13 pulse-labeling; Forest ecosystem; Photosynthate; Plant allocation; Soil carbon

期刊名称:BIOGEOCHEMISTRY ( 影响因子:4.812; 五年影响因子:5.709 )

ISSN: 0168-2563

年卷期: 2022 年 160 卷 3 期

页码:

收录情况: SCI

摘要: Understanding how assimilated carbon (C) is allocated in forest ecosystems is crucial for process-based models and accurate prediction of global C cycling. We tracked the fate of recently assimilated C of Korean pine (Pinus koraiensis) and birch (Betula platyphylla) among various C pools in a temperate forest for 27 days using the (CO2)-C-13 pulse labeling approach. Birch had low carbon use efficiency (CUE) and allocated 66.9% of the recently assimilated C to metabolism and respiration, and had faster turnover rate of recently assimilated C in the labile pool of leaves and soil compared to pine. Pine had high CUE and allocated 12.3% of the recently assimilated C to metabolism and respiration. Our study showed that pine, as the dominate species of the climax stage, has a more conservative strategy of C use than the pioneer species birch, which may be one of the underlying mechanisms of higher soil carbon sequestration in pine forests compared to birch forests.

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