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      Impact of agronomy practices on the effects of reduced tillage systems on CH 4 and N 2O emissions from agricultural fields: A global meta-analysis

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          Abstract

          The effect of no- and reduced tillage (NT/RT) on greenhouse gas (GHG) emission was highly variable and may depend on other agronomy practices. However, how the other practices affect the effect of NT/RT on GHG emission remains elusive. Therefore, we conducted a global meta-analysis (including 49 papers with 196 comparisons) to assess the effect of five options (i.e. cropping system, crop residue management, split application of N fertilizer, irrigation, and tillage duration) on the effect of NT/RT on CH 4 and N 2O emissions from agricultural fields. The results showed that NT/RT significantly mitigated the overall global warming potential (GWP) of CH 4 and N 2O emissions by 6.6% as compared with conventional tillage (CT). Rotation cropping systems and crop straw remove facilitated no-tillage (NT) to reduce the CH 4, N 2O, or overall GWP both in upland and paddy field. NT significantly mitigated the overall GWP when the percentage of basal N fertilizer (P BN) >50%, when tillage duration > 10 years or rainfed in upland, while when P BN <50%, when duration between 5 and 10 years, or with continuous flooding in paddy field. RT significantly reduced the overall GWP under single crop monoculture system in upland. These results suggested that assessing the effectiveness of NT/RT on the mitigation of GHG emission should consider the interaction of NT/RT with other agronomy practices and land use type.

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          Most cited references 78

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          Production, oxidation, emission and consumption of methane by soils: A review

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            Limited potential of no-till agriculture for climate change mitigation

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              The potential to mitigate global warming with no-tillage management is only realized when practised in the long term

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                Author and article information

                Contributors
                Role: ConceptualizationRole: Data curationRole: InvestigationRole: MethodologyRole: Writing – original draft
                Role: ConceptualizationRole: Data curationRole: MethodologyRole: Writing – original draft
                Role: Data curationRole: Formal analysis
                Role: Data curationRole: Methodology
                Role: InvestigationRole: Methodology
                Role: InvestigationRole: Methodology
                Role: ConceptualizationRole: Funding acquisitionRole: Project administrationRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS One
                PLoS ONE
                plos
                plosone
                PLoS ONE
                Public Library of Science (San Francisco, CA USA )
                1932-6203
                21 May 2018
                2018
                : 13
                : 5
                Affiliations
                China National Rice Research Institution, Hangzhou, China
                Tennessee State University, UNITED STATES
                Author notes

                Competing Interests: The authors have declared that no competing interests exist.

                Article
                PONE-D-17-41160
                10.1371/journal.pone.0196703
                5962074
                29782525
                © 2018 Feng et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Page count
                Figures: 8, Tables: 2, Pages: 17
                Product
                Funding
                Funded by: This work was supported by the State Key Program of China (2016YFD0300906) and the Innovation Program of Chinese Academy of Agricultural Sciences.
                Award Recipient :
                This work was supported by the State Key Program of China (2016YFD0300906 to JF) and the Innovation Program of Chinese Academy of Agricultural Sciences.
                Categories
                Research Article
                Biology and Life Sciences
                Agriculture
                Crop Science
                Crops
                Biology and Life Sciences
                Agriculture
                Crop Science
                Crops
                Cereal Crops
                Biology and Life Sciences
                Agriculture
                Agricultural Soil Science
                Ecology and Environmental Sciences
                Soil Science
                Agricultural Soil Science
                People and Places
                Geographical Locations
                Asia
                China
                Biology and Life Sciences
                Agriculture
                Agronomy
                Plant Products
                Straw
                Biology and Life Sciences
                Agriculture
                Crop Science
                Plant Products
                Straw
                Biology and Life Sciences
                Agriculture
                Agrochemicals
                Fertilizers
                Biology and Life Sciences
                Organisms
                Eukaryota
                Plants
                Grasses
                Rice
                Research and Analysis Methods
                Experimental Organism Systems
                Plant and Algal Models
                Rice
                Biology and Life Sciences
                Organisms
                Eukaryota
                Plants
                Grasses
                Wheat
                Custom metadata
                All relevant data are within the paper and its Supporting Information files.

                Uncategorized

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