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Divergent responses of cropland soil organic carbon to warming across the Sichuan Basin of China

文献类型：期刊论文

作者Li, Aiwen7; Zhang, Yuanyuan7; Li, Chengji7; Deng, Qian7; Fang, Hongyan7; Dai, Tianfei7,8; Chen, Chaoping9; Wang, Jingting1; Fan, Zemeng2,3; Shi, Wenjiao2,3
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2022-12-10
卷号851页码:11
ISSN号0048-9697
关键词Cropland soil organic carbon change Climate warming Precipitation Cropland type Soil type Sichuan Basin
DOI10.1016/j.scitotenv.2022.158323
通讯作者Li, Qiquan(liqq@lreis.ac.cn)
英文摘要Cropland soils are considered to have the potential to sequester carbon (C). Warming can increase soil organic C (SOC) by enhancing primary production, but it can also cause carbon release from soils. However, the role of warming in governing cropland SOC dynamics over broad geographic scales remains poorly understood. Using over 4000 soil samples collected in the 1980s and 2010s across the Sichuan Basin of China, this study assessed the warming-induced cropland SOC change and the correlations with precipitation, cropland type and soil type. Results showed mean SOC content increased from 11.10 to 13.85 g C kg(-1). Larger SOC increments were observed under drier conditions (precipitation < 1050 mm, dryland and paddy-dryland rotation cropland), which were 1.67-2.23 times higher than under wetter conditions (precipitation > 1050 mm and paddy fields). Despite the significant associations of SOC increment with crop productivity, precipitation, fertilization, cropland type and soil type, warming also acted as one of major contributors to cropland SOC change. The SOC increment changed parabolically with the rise in temperature increase rate under relatively drier conditions, while temperature increase had no impact on cropland SOC increment under wetter conditions. Meanwhile, the patterns of the parabolical relationship varied with soil types in drylands, where the threshold of temperature increase rate, the point at which the SOC increment switched from increasing to decreasing with warming, was lower for clayey soils (Ali-Perudic Argosols) than for sandy soils (Purpli-Udic Cambosols). These results illustrate divergent responses of cropland SOC to warming under different environments, which were contingent on water conditions and soil types. Our findings emphasize the importance of formulating appropriate field water management for sustainable C sequestration and the necessity of incorporating environment-specific mechanisms in Earth system models for better understanding of the soil C-climate feedback in complex environments.
WOS关键词PURPLE HILLY AREA ; TEMPERATURE SENSITIVITY ; NITROGEN DEPOSITION ; SOUTHWEST CHINA ; CLIMATE-CHANGE ; BLACK SOIL ; MOISTURE ; ACCUMULATION ; RESPIRATION ; INCREASE
资助项目Natural Science Foundation of Sichuan Province, China[2022NSFSC0104] ; National Natural Science Foundation of China[41930647] ; National Natural Science Foundation of China[41971358]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者ELSEVIER
WOS记录号WOS:000863090700012
资助机构Natural Science Foundation of Sichuan Province, China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/185464]  
专题中国科学院地理科学与资源研究所
通讯作者Li, Qiquan
作者单位1.Chinese Acad Sci, Chengdu Inst Biol, Key Lab Environm & Appl Microbiol, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
4.Sichuan Agr Univ, Coll Environm Sci, Chengdu 611130, Peoples R China
5.Minist Nat Resources, Key Lab Invest & Monitoring, Protect & Utilizat Cultivated Land Resources, Chengdu 611130, Peoples R China
6.Univ Southern Calif, Spatial Sci Inst, Los Angeles, CA 90089 USA
7.Sichuan Agr Univ, Coll Resources, Chengdu 611130, Peoples R China
8.Sichuan Green Food Dev Ctr, Chengdu 610041, Peoples R China
9.Meteorol Bur Sichuan Prov, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Li, Aiwen,Zhang, Yuanyuan,Li, Chengji,et al. Divergent responses of cropland soil organic carbon to warming across the Sichuan Basin of China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,851:11.
APA Li, Aiwen.,Zhang, Yuanyuan.,Li, Chengji.,Deng, Qian.,Fang, Hongyan.,...&Li, Qiquan.(2022).Divergent responses of cropland soil organic carbon to warming across the Sichuan Basin of China.SCIENCE OF THE TOTAL ENVIRONMENT,851,11.
MLA Li, Aiwen,et al."Divergent responses of cropland soil organic carbon to warming across the Sichuan Basin of China".SCIENCE OF THE TOTAL ENVIRONMENT 851(2022):11.

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来源：地理科学与资源研究所

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