Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China
Characterizing greenhouse gas (GHG) emissions and global warming potential (GWP) has become a key step in the estimation of atmospheric GHG concentrations and their potential mitigation by cropland management. However, the impacts of organic amendments on GHG, GWP, and yield-scaled GWP on cropland h...
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MDPI AG
2020-06-01
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Online Access: | https://www.mdpi.com/2073-4433/11/6/614 |
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author | Hamidou Bah Xiao Ren Yanqiang Wang Jialiang Tang Bo Zhu |
author_facet | Hamidou Bah Xiao Ren Yanqiang Wang Jialiang Tang Bo Zhu |
author_sort | Hamidou Bah |
collection | DOAJ |
description | Characterizing greenhouse gas (GHG) emissions and global warming potential (GWP) has become a key step in the estimation of atmospheric GHG concentrations and their potential mitigation by cropland management. However, the impacts of organic amendments on GHG, GWP, and yield-scaled GWP on cropland have not been well documented. Here, we investigate four amendment treatments (no amendment, mineral fertilizers, and pig slurry or crop residue combined with mineral fertilizers) during a two-year field experiment in rain-fed wheat-maize cropping systems. The results show that the average annual cumulative methane (CH<sub>4</sub>) flux ranged from −2.60 to −2.97 kg·C·ha<sup>−1</sup> while nitrous oxide (N<sub>2</sub>O) flux ranged from 0.44 to 4.58 kg·N·ha<sup>−1</sup> across all four treatments. N<sub>2</sub>O emissions were significantly correlated with soil inorganic nitrogen (i.e., NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>−</sup>-N), and soil dissolved organic carbon (DOC) during both the winter wheat and summer maize seasons. On average, organic amendments combined with mineral fertilizers increased the annual GWP by 26–74% and yield-scaled GWP by 19–71% compared to those under only mineral fertilizers application. This study indicates that the fertilization strategy for Eutric Regosols can shift from only mineral fertilizers to organic amendments combined with mineral fertilizers, which can help mitigate GHG emissions and GWP while maintaining crop yields. |
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issn | 2073-4433 |
language | English |
last_indexed | 2024-03-10T19:14:46Z |
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series | Atmosphere |
spelling | doaj.art-2bab54320e5f405ab9da928be57f297e2023-11-20T03:27:15ZengMDPI AGAtmosphere2073-44332020-06-0111661410.3390/atmos11060614Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, ChinaHamidou Bah0Xiao Ren1Yanqiang Wang2Jialiang Tang3Bo Zhu4Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, ChinaKey Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, ChinaCharacterizing greenhouse gas (GHG) emissions and global warming potential (GWP) has become a key step in the estimation of atmospheric GHG concentrations and their potential mitigation by cropland management. However, the impacts of organic amendments on GHG, GWP, and yield-scaled GWP on cropland have not been well documented. Here, we investigate four amendment treatments (no amendment, mineral fertilizers, and pig slurry or crop residue combined with mineral fertilizers) during a two-year field experiment in rain-fed wheat-maize cropping systems. The results show that the average annual cumulative methane (CH<sub>4</sub>) flux ranged from −2.60 to −2.97 kg·C·ha<sup>−1</sup> while nitrous oxide (N<sub>2</sub>O) flux ranged from 0.44 to 4.58 kg·N·ha<sup>−1</sup> across all four treatments. N<sub>2</sub>O emissions were significantly correlated with soil inorganic nitrogen (i.e., NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>−</sup>-N), and soil dissolved organic carbon (DOC) during both the winter wheat and summer maize seasons. On average, organic amendments combined with mineral fertilizers increased the annual GWP by 26–74% and yield-scaled GWP by 19–71% compared to those under only mineral fertilizers application. This study indicates that the fertilization strategy for Eutric Regosols can shift from only mineral fertilizers to organic amendments combined with mineral fertilizers, which can help mitigate GHG emissions and GWP while maintaining crop yields.https://www.mdpi.com/2073-4433/11/6/614organic fertilizersCH<sub>4</sub> emissionsN<sub>2</sub>O emissionsglobal warming potentialEutric Regosols |
spellingShingle | Hamidou Bah Xiao Ren Yanqiang Wang Jialiang Tang Bo Zhu Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China Atmosphere organic fertilizers CH<sub>4</sub> emissions N<sub>2</sub>O emissions global warming potential Eutric Regosols |
title | Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China |
title_full | Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China |
title_fullStr | Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China |
title_full_unstemmed | Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China |
title_short | Characterizing Greenhouse Gas Emissions and Global Warming Potential of Wheat-Maize Cropping Systems in Response to Organic Amendments in Eutric Regosols, China |
title_sort | characterizing greenhouse gas emissions and global warming potential of wheat maize cropping systems in response to organic amendments in eutric regosols china |
topic | organic fertilizers CH<sub>4</sub> emissions N<sub>2</sub>O emissions global warming potential Eutric Regosols |
url | https://www.mdpi.com/2073-4433/11/6/614 |
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