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  • Title: Effects of no-tillage on greenhouse gas emissions in maize fields in a semi-humid temperate climate region.
    Author: Li Z, Zhang Q, Li Z, Qiao Y, Du K, Tian C, Zhu N, Leng P, Yue Z, Cheng H, Chen G, Li F.
    Journal: Environ Pollut; 2022 Sep 15; 309():119747. PubMed ID: 35835280.
    Abstract:
    Agricultural tillage practices have a significant impact on the generation and consumption of greenhouse gases (GHGs), the primary causes of global warming. Two tillage systems, conventional tillage (CT) and no-tillage (NT), were compared to evaluate their effects on GHG emissions in this study. Averaged from 2018 to 2020, significant decreases of CO2 and N2O emissions by 7.4% and 51.1% were observed in NT as compared to those of CT. NT was also found to inhibit the soil CH4 uptake. In this study, soil was a source of CO2 and N2O but a sink for CH4. The effect of soil temperature on the fluxes of CO2 was more pronounced than that of soil moisture. However, soil temperature and soil moisture had a weak correlation with CH4 and N2O flux variations. As compared to CT, NT did not affect maize yields but significantly reduced global warming potential (GWP) by 8.07%. For yield-scaled GWP, no significant difference was observed in NT (9.63) and CT (10.71). Taken together, NT was an environment-friendly tillage practice to mitigate GHG emissions in the soil under the tested conditions.
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