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Allocation pattern and accumulation potential of carbon stock in natural spruce forests in northwest China
Yue, Junwei; Guan, Jinhong; Deng, Lei; Zhang, Jianguo; Li, Guoqing; Du, Sheng
2018-05-28
Source PublicationPeerJ
description.correspondentemailshengdu@ms.iswc.ac.cn
Issue6Pages:e4859
Abstract
Background: The spruce forests are dominant communities in northwest China,
and play a key role in national carbon budgets. However, the patterns of carbon
stock distribution and accumulation potential across stand ages are poorly
documented.
Methods: We investigated the carbon stocks in biomass and soil in the natural
spruce forests in the region by surveys on 39 plots. Biomass of tree components were
estimated using allometric equations previously established based on tree height
and diameter at breast height, while biomass in understory (shrub and herb) and
forest floor were determined by total harvesting method. Fine root biomass was
estimated by soil coring technique. Carbon stocks in various biomass components
and soil (0–100 cm) were estimated by analyzing the carbon content of each
component.
Results: The results showed that carbon stock in these forest ecosystems can be as
high as 510.1 t ha-1, with an average of 449.4 t ha-1. Carbon stock ranged from
28.1 to 93.9 t ha-1 and from 0.6 to 8.7 t ha-1 with stand ages in trees and deadwoods,
respectively. The proportion of shrubs, herbs, fine roots, litter and deadwoods
ranged from 0.1% to 1% of the total ecosystem carbon, and was age-independent.
Fine roots and deadwood which contribute to about 2% of the biomass carbon
should be attached considerable weight in the investigation of natural forests.
Soil carbon stock did not show a changing trend with stand age, ranging from
254.2 to 420.0 t ha-1 with an average of 358.7 t ha-1. The average value of carbon
sequestration potential for these forests was estimated as 29.4 t ha-1, with the lower
aged ones being the dominant contributor. The maximum carbon sequestration rate
was 2.47 t ha-1 year-1 appearing in the growth stage of 37–56 years.
Conclusion: The carbon stock in biomass was the major contributor to the
increment of carbon stock in ecosystems. Stand age is not a good predictor of soil carbon stocks and accurate evaluation of the soil carbon dynamics thus requireslong-term monitoring in situ. The results not only revealed carbon stock status and dynamics in these natural forests but were helpful to understand the role of Natural Forest Protection project in forest carbon sequestration as well.
KeywordSpruce Forests Stand Age Carbon Stock Carbon Sequestration Potential
DOI10.7717/peerj.4859
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8160
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorDu, Sheng
Affiliation1.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, People’s Republic of China
2.Institute of Soil andWater Conservation, Northwest A&F University, Yangling, Shaanxi, People’s Republic of China
3.University of Chinese Academy of Sciences, Beijing, People’s Republic of China
4.Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, Qinghai, People’s Republic of China
5.Upper and Middle Yellow River Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, Xi’an, Shaanxi, People’s Republic of China
Recommended Citation
GB/T 7714
Yue, Junwei,Guan, Jinhong,Deng, Lei,et al. Allocation pattern and accumulation potential of carbon stock in natural spruce forests in northwest China[J]. PeerJ,2018(6):e4859.
APA Yue, Junwei,Guan, Jinhong,Deng, Lei,Zhang, Jianguo,Li, Guoqing,&Du, Sheng.(2018).Allocation pattern and accumulation potential of carbon stock in natural spruce forests in northwest China.PeerJ(6),e4859.
MLA Yue, Junwei,et al."Allocation pattern and accumulation potential of carbon stock in natural spruce forests in northwest China".PeerJ .6(2018):e4859.
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