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Seasonal variations and driving mechanisms of CO2 fluxes over a winter-wheat and summer-maize rotation cropland in the North China plain

文献类型：期刊论文

作者Yue, Zewei1,2,3; Li, Zhao1,2,3; Yu, Guirui2; Chen, Zhi2; Shi, Peili2; Qiao, Yunfeng1,2; Du, Kun1,2; Tian, Chao1,2; Zhao, Fenghua1,2; Leng, Peifang1,2
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2023-11-15
卷号342页码:109699
关键词Net ecosystem productivity Ecosystem respiration Gross primary productivity Rotation cropland Crop phenology Random forest
DOI10.1016/j.agrformet.2023.109699
产权排序1
文献子类Article
英文摘要Characterization of crop CO2 fluxes in different growing periods and their corresponding responses to abiotic and biotic factors is essential for the adaption of cropland ecosystem carbon balance to future climate change and management practices. In this study, based on long-term (2003-2018) monitoring of CO2 fluxes, meteorological data and leaf area index (LAI) of a winter wheat-summer maize rotation cropland in the North China Plain, the relationship between CO2 fluxes of different growing periods and the driving factors (i.e., abiotic and biotic factors) was explored to identify the important affecting factors. The Random Forest (RF) algorithm revealed that LAI was the most important driving factor of CO2 fluxes in the wheat season, except for WGPW (from sowing to maturity). Net ecosystem productivity (NEP) had significant positive relationships with LAI, photosynthetically active radiation (PAR) and soil water content (SWC) in four different growing periods. Air temperature (Ta) was positively correlated with ecosystem respiration (ER), and LAI and PAR were positively correlated with gross primary productivity (GPP). In the maize season, the RF algorithm revealed that LAI, PAR and SWC were important drivers of CO2 fluxes. NEP and GPP had significant negative relationships with precipitation (PPT) in RGPM (from tasseling to maturity) and WGPM (from sowing to maturity). Ta was positively correlated with ER, and SWC was positively correlated with NEP and GPP except for VGP2M (from jointing to tasseling). For annual fluxes, the interannual variability (IAV) of NEP, ER and GPP were mainly attributed to IAV of the maximum daily NEP (NEPmax), maximum daily ER (ERmax) and maximum daily GPP (GPPmax), respectively. Our findings provide deep insight into CO2 flux characteristics of wheat-maize rotation systems in different growing periods and their influencing mechanisms, which are crucial for predicting the carbon cycle of cropland ecosystems under climate change.
WOS关键词CARBON-DIOXIDE EXCHANGE ; GROSS PRIMARY PRODUCTIVITY ; NET ECOSYSTEM EXCHANGE ; INTERANNUAL VARIABILITY ; BIOPHYSICAL CONTROLS ; CLIMATE-CHANGE ; LOESS PLATEAU ; AMAZON FOREST ; SPRING MAIZE ; WATER
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001080500500001
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/198857]  
专题禹城站农业生态系统研究中心_外文论文
作者单位1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Shandong Yucheng Shandong Agroecosystem Natl Obser, Minist Sci & Technol, Yucheng 251200, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Peking Univ, Beijing 100049, Peoples R China
6.Florida A&M Univ, Florida State Univ, Coll Engn, Dept Civil & Environm Engn, Tallahassee, FL USA
7.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11 Datun Rd, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Yue, Zewei,Li, Zhao,Yu, Guirui,et al. Seasonal variations and driving mechanisms of CO2 fluxes over a winter-wheat and summer-maize rotation cropland in the North China plain[J]. AGRICULTURAL AND FOREST METEOROLOGY,2023,342:109699.
APA Yue, Zewei.,Li, Zhao.,Yu, Guirui.,Chen, Zhi.,Shi, Peili.,...&Li, Fadong.(2023).Seasonal variations and driving mechanisms of CO2 fluxes over a winter-wheat and summer-maize rotation cropland in the North China plain.AGRICULTURAL AND FOREST METEOROLOGY,342,109699.
MLA Yue, Zewei,et al."Seasonal variations and driving mechanisms of CO2 fluxes over a winter-wheat and summer-maize rotation cropland in the North China plain".AGRICULTURAL AND FOREST METEOROLOGY 342(2023):109699.

入库方式： OAI收割

来源：地理科学与资源研究所

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