Greenhouse gas emissions and crop yield in no-tillage systems: A meta-analysis

•No-till could reduce GHGs emissions and increase crop yields in dry climates.•No-till substantially decreased the global warming potential (GWP) of acid soils.•No-till enhanced barley yield by approximately 49%.•No-till reduced GWP in rice fields by suppressing CO2 (22%) and CH4 (22%) emissions. No...

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Veröffentlicht in:Agriculture, ecosystems & environment ecosystems & environment, 2018-12, Vol.268 (C), p.144-153
Hauptverfasser: Huang, Yawen, Ren, Wei, Wang, Lixin, Hui, Dafeng, Grove, John H., Yang, Xiaojuan, Tao, Bo, Goff, Ben
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container_end_page 153
container_issue C
container_start_page 144
container_title Agriculture, ecosystems & environment
container_volume 268
creator Huang, Yawen
Ren, Wei
Wang, Lixin
Hui, Dafeng
Grove, John H.
Yang, Xiaojuan
Tao, Bo
Goff, Ben
description •No-till could reduce GHGs emissions and increase crop yields in dry climates.•No-till substantially decreased the global warming potential (GWP) of acid soils.•No-till enhanced barley yield by approximately 49%.•No-till reduced GWP in rice fields by suppressing CO2 (22%) and CH4 (22%) emissions. No-tillage (NT) has been touted as one of several climate-smart agriculture (CSA) management practices that improve food security and enhance agroecosystem resilience to climate change. However, the sustainable effectiveness of NT greatly depends on trade-offs between NT-induced changes in crop yield and greenhouse gas (GHG, i.e. CH4, CO2, and N2O) emissions. Such trade-offs are regulated by climate fluctuations and heterogeneous soil conditions and have not been well addressed. Supporting CSA management decisions requires advancing our understanding of how NT affects crop yield and GHG emissions in different agroecological regions. In this study, a meta-analysis was conducted using 740 paired measurements from 90 peer-reviewed articles to assess the effects of NT on crop yield, GHG emissions, and the global warming potential (GWP) of major cereal cropping systems. Compared to conventional tillage (CT), NT reduced in GHG emissions and increased crop yield in dry, but not humid, climates, and reduced in the GWP at sites with acidic soils. Across different cropping systems, NT enhanced barley yield by 49%, particularly in dry climates, and it decreased the GWP of rice fields through a 22% reduction in both CO2 and CH4 emissions. Our synthesis suggests that NT is an effective CSA management practice because of its potential for climate change mitigation and crop yield improvement. However, the net effect of NT (relative to CT) was influenced by several environmental and agronomic factors (climatic conditions, tillage duration, soil texture, pH, crop species). Therefore, agroecological setting must be taken into consideration when conducting a comparative evaluation of different tillage practices.
doi_str_mv 10.1016/j.agee.2018.09.002
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(ORNL), Oak Ridge, TN (United States)</creatorcontrib><title>Greenhouse gas emissions and crop yield in no-tillage systems: A meta-analysis</title><title>Agriculture, ecosystems &amp; environment</title><description>•No-till could reduce GHGs emissions and increase crop yields in dry climates.•No-till substantially decreased the global warming potential (GWP) of acid soils.•No-till enhanced barley yield by approximately 49%.•No-till reduced GWP in rice fields by suppressing CO2 (22%) and CH4 (22%) emissions. No-tillage (NT) has been touted as one of several climate-smart agriculture (CSA) management practices that improve food security and enhance agroecosystem resilience to climate change. However, the sustainable effectiveness of NT greatly depends on trade-offs between NT-induced changes in crop yield and greenhouse gas (GHG, i.e. CH4, CO2, and N2O) emissions. Such trade-offs are regulated by climate fluctuations and heterogeneous soil conditions and have not been well addressed. 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ispartof Agriculture, ecosystems & environment, 2018-12, Vol.268 (C), p.144-153
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language eng
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source Elsevier ScienceDirect Journals
subjects acid soils
Acidic soils
Agricultural ecosystems
Agricultural practices
Agricultural production
agroecological zones
agroecosystems
Agronomy
Barley
Carbon dioxide
Cereal crops
Climate
Climate change
Climate change mitigation
Climate effects
Climate-smart agriculture
Climatic conditions
climatic factors
conventional tillage
Crop yield
Cropping systems
Crops
Digital agriculture
Emissions
ENVIRONMENTAL SCIENCES
Food security
Global warming
global warming potential
grain yield
Greenhouse effect
Greenhouse gas emissions
Greenhouse gases
Humid climates
Management
Meta-analysis
Methane
methane production
Nitrous oxide
No-tillage
paddies
Rice fields
Soil conditions
Soil properties
soil quality
Soil texture
Texture
Tillage
Tradeoffs
title Greenhouse gas emissions and crop yield in no-tillage systems: A meta-analysis
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