IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Land use change effects on ecosystemcarbon budget in the Sichuan Basin of Southwest China: Conversion of cropland to forest ecosystem
Xiaoguo Wang1; Minghua Zhou1,2; Tao Li1; Yun Ke1; Bo Zhu1
2017
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume609Pages:556-562
SubtypeArticle
Abstract

In the humid subtropics, conversion of cropland to forest has been recognized to influence carbon cycling (e.g., soil CO2 emissions) and the associated ecosystem carbon balance. A three-year field study was conducted in situ to quantitatively evaluate effects of land use change on carbon budget in a cropland (under winter wheat-summer maize rotation) comparison with the adjacent forest ecosystem. During the three-year experimental period, on average, soil heterotrophic respirations were 35.19 mg C.m(-2).h(-1) for the cropland and 40.02 mg C.m(-2).h(-1) for the adjacent forest ecosystem. The quantified net primary production (NPP) were 8724.78 kg C.ha(-1).year(-1) for the cropland (3218.14 kg C.ha(-1) for winter wheat season and 5506.64 kg C.ha(-1) for summer maize season) and 6478.99 kg C.ha(-1).year(-1) for the adjacent forest ecosystem. Thus, the average positive net ecosystem production (NEP) of 5139.33 kg C.ha(-1).year(-1) and 2790.43 kg C.ha(-1).year(-1) were gained in the cropland and the adjacent forest ecosystem, respectively. Nonetheless, if take into consideration of crop grain harvest (i.e., removal), the mean NEP was only 976.69 kg C.ha(-1).year(-1) for cropland which were over three-fold lower than for the adjacent forest ecosystem. The practice of conversion of cropland (maize-wheat rotation system) to forest consequently resulted in an average annual net carbon sequestration of 1813.74 kg C.ha(-1).year(-1) in the study. Therefore, our findings highlight that practices of conversion of subtropical cropland to forest commonly conducted in the last decades act as sinks of atmospheric CO2 in southwest China.

KeywordLand Use Change Soil Organic Carbon Net Primary Productivity Carbon Balance
DOI10.1016/j.scitotenv.2017.07.167
Indexed BySCI
Language英语
Quartile2区
TOP
WOS IDWOS:000410352900061
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19109
Collection山地表生过程与生态调控重点实验室
Affiliation1.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment Research, Chinese Academy of Sciences, Chengdu 610041, PR China
2.Institute of Bio- and Geosciences – Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
Recommended Citation
GB/T 7714
Xiaoguo Wang,Minghua Zhou,Tao Li,et al. Land use change effects on ecosystemcarbon budget in the Sichuan Basin of Southwest China: Conversion of cropland to forest ecosystem[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,609:556-562.
APA Xiaoguo Wang,Minghua Zhou,Tao Li,Yun Ke,&Bo Zhu.(2017).Land use change effects on ecosystemcarbon budget in the Sichuan Basin of Southwest China: Conversion of cropland to forest ecosystem.SCIENCE OF THE TOTAL ENVIRONMENT,609,556-562.
MLA Xiaoguo Wang,et al."Land use change effects on ecosystemcarbon budget in the Sichuan Basin of Southwest China: Conversion of cropland to forest ecosystem".SCIENCE OF THE TOTAL ENVIRONMENT 609(2017):556-562.
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