气候变化领域集成服务门户(CCPortal): Short-term effects of understory vegetation and litter on soil CO2 flux of natural forests in cold temperate zone of China [林下植被和凋落物对我国寒温带天然林土壤CO2通量的短期影响]

CCPortal

DOI	10.12171/j.1000-1522.20200249
	Short-term effects of understory vegetation and litter on soil CO2 flux of natural forests in cold temperate zone of China [林下植被和凋落物对我国寒温带天然林土壤CO2通量的短期影响]
	Gao M.; Man X.; Duan B.
发表日期	2021
ISSN	10001522
起始页码	55
结束页码	65
卷号	43 期号:3
英文摘要	Objective: In order to study the effects of understory vegetation and litter on soil CO2 flux in cold temperate natural forests in China, we analyzed and explored the characteristics of CO2 flux emission under different treatments, to provide reference for the management of forest ecosystem and the study of soil greenhouse gases in Daxing'an Mountains region and theoretical reference. Method: In the period from May to September in 2019, the method of static box-gas chromatography was used to study soil CO2 flux emission characteristics in four main forest types (Betula platyphylla forest, Populus davidiana forest, Pinus sylvestrisvar.mongolica forest and Larix gmelinii forest) in the north of Daxing'an Mountains. Result: The soil CO2 flux of the four forest types under different treatments all showed a single-peak curve changing trend, and the peak appeared in July or August. The removal of litter increased the soil respiration of broadleaved forests and decreased the soil respiration of coniferous forests. However, the changes did not reach a significant level (P > 0.05). Compared with the natural state, the removal of understory vegetation significantly ( P < 0.05) increased the average CO 2 flux of Betula platyphylla forest, Populus davidiana forest and Larix gmelinii forest by 27.57%, 15.84% and 24.13%, respectively, but decreased it in Pinus sylvestrisvar. mongolica forest by 0.68% (P > 0.05). With the simultaneous removal of understory vegetation and litter, the average CO 2 fluxes of Betula platyphylla forest, Populus davidiana forest and Larix gmelinii forest increased by 20.05%−25.34%, but the Pinus sylvestris var. mongolica forest decreased by 12.36%. The average flux of broadleaved forest was significantly larger than that of coniferous forest (P < 0.05) when the understory vegetation and litter were both removed. Conclusion: The existence or non-existence of litter and understory vegetation would have different effects on soil CO2 flux. Also, the impact on different forest types also varies. Scientific and reasonable understory management strategy plays a key role in regulating carbon dioxide emissions and the protection of ecological environment. Copyright © 2021 Journal of Beijing Forestry University. All rights reserved.
英文关键词	CO2 flux; Cold temperate zone; Litter; Natural forest; Understory vegetation
来源期刊	Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177231
作者单位	School of Forestry, Northeast Forestry University, Key Laboratory of Sustainable Forest EcosystemManagement of Ministry of Education, Harbin, 150040, China
推荐引用方式 GB/T 7714	Gao M.,Man X.,Duan B.. Short-term effects of understory vegetation and litter on soil CO2 flux of natural forests in cold temperate zone of China [林下植被和凋落物对我国寒温带天然林土壤CO2通量的短期影响][J],2021,43(3).
APA	Gao M.,Man X.,&Duan B..(2021).Short-term effects of understory vegetation and litter on soil CO2 flux of natural forests in cold temperate zone of China [林下植被和凋落物对我国寒温带天然林土壤CO2通量的短期影响].Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University,43(3).
MLA	Gao M.,et al."Short-term effects of understory vegetation and litter on soil CO2 flux of natural forests in cold temperate zone of China [林下植被和凋落物对我国寒温带天然林土壤CO2通量的短期影响]".Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University 43.3(2021).