首页|Impact of rainfed and irrigated agriculture systems on soil carbon stock under different climate scenarios in the semi-arid region of Brazil

Impact of rainfed and irrigated agriculture systems on soil carbon stock under different climate scenarios in the semi-arid region of Brazil

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Understanding the dynamics of soil organic carbon (SOC) is of fundamental importance in land use and management, whether in the current researches or in future scenarios of agriculture systems considering climate change. In order to evaluate SOC stock of the three districts (Delmiro Gouveia, Pariconha, and Inhapi districts) in the semi-arid region of Brazil in rainfed and irrigated agriculture systems under different climate scenarios using the Century model, we obtained RCP4.5 and RCP8.5 climate scenarios derived from the Eta Regional Climate Model (Eta-HadGEM2-ES and Eta-MIROC5) from the National Institute for Space Research, and then input the data of bulk density, pH, soil texture, maximum temperature, minimum temperature, and rainfall into the soil and climate files of the Century model. The results of this study showed that the Eta-HadGEM2-ES model was effective in estimating air temperature in the future period. In rainfed agriculture system, SOC stock under the baseline scenario was lower than that under RCP4.5 and RCP8.5 climate scenarios, while in irrigated agriculture system, SOC stock in the almost all climate scenarios (RCP4.5 and RCP8.5) and models (Eta-HadGEM2-ES and Eta-MIROC5) will increase by 2100. The results of this study will help producers in the semi-arid region of Brazil adopt specific agriculture systems aimed at mitigating greenhouse gas emissions.

soil carbon stockagriculture systemsclimate scenariosCentury modelsemi-arid region

AndréL CARVALHO、Renato A ARAúJO-NETO、Guilherme B LYRA、Carlos E P CERRI、Stoécio M F MAIA

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Center for Agrarian Sciences,Federal University of Alagoas,Rio Largo 57072-900,Brazil

Luiz de Queiroz College of Agriculture,The University of São Paulo,Piracicaba 13418-900,Brazil

Federal Institute of Alagoas,Marechal Deodoro 57160-000,Brazil

the National Council for Scientific and Technological Development of Brazil and Ministry of Science,Technology,Innovation (MFederal University of Pernambuco and the University of So PauloBrazilian Research Network on Global Climate Change (Rede Clima) which provided the scholarship to Renato Américo ARAúJO-NET

383697/2015-8

2022

干旱区科学
中国科学院新疆生态与地理研究所,科学出版社

干旱区科学

CSTPCDCSCDSCI
影响因子：1.743
ISSN：1674-6767
年,卷(期)：2022.14(4)
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