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Does no-till crop management mitigate gaseous emissions and reduce yield disparities: An empirical US-China evaluation

Western Sydney University
Shakoor, Awais
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26183/mnx2-e902&rft.title=Does no-till crop management mitigate gaseous emissions and reduce yield disparities: An empirical US-China evaluation dataset&rft.identifier=10.26183/mnx2-e902&rft.publisher=Western Sydney University&rft.description=Global agricultural systems face one of the greatest sustainability challenges: meeting the growing demand for food without leaving a negative environmental footprint. United States (US) and China are the two largest economies and account for 39 % of total global greenhouse gases (GHG) emissions into the atmosphere. No-till is a promising land management option that allows agriculture to better adapt and mitigate climate change effects compared to traditional tillage. However, the efficacy of no-till for mitigating GHG is still debatable. In this meta-analysis, we comprehensively assess the impact of no-till (relative to traditional tillage) on GHG mitigation potential and crop productivity in different agroecological systems and management regimes in the US and China. Overall, no-till in China did not change crop yields, although soil CO2 (8 %) and N2O (12 %) emissions decreased significantly, while soil CH4 emissions increased by 12 %. In contrast to Chinese no-till, a significant improvement in crop yields (up to 12 %) was recorded on US cropland under no-till. Moreover, significant decreases in soil N2O (21 %) and CH4 (12 %) emissions were observed. Of the three cropping systems, only wheat showed significant reduction in CO2, N2O and CH4 emissions in the Chinese no-till system. In the case of US, no-till soybean-rice and maize cropping systems demonstrated significant emission reductions for N2O and CO2, respectively. Interestingly, yields of no-till maize in China and rice in US exceeded those of other no-till cereals. In China, no-till on medium-texture soils resulted in significant reductions in GHG emissions and higher crop yields compared to other soil types. In both countries, the relatively higher crop yields under irrigated versus non-irrigated no-till and the significant yield differences on fine textured soils under US no-till are likely due to the substantial N2O reductions. In summary, crop yield disparities from no-till between China and the US were related to the insignificant effects on controlling CH4 emissions and successfully mitigating N2O, respectively. This study comprehensively demonstrates how cropping system and pedoclimatic conditions influence the relative effectiveness of no-till in both countries. The supporting data is published within the described article as supplementary materials. The full dataset is attached to this record. &rft.creator=Shakoor, Awais &rft.date=2024&rft.relation=https://doi.org/10.1016/j.scitotenv.2024.170310&rft.coverage=&rft_rights=Copyright Western Sydney University&rft_rights=CC BY 4.0: Attribution 4.0 International http://creativecommons.org/licenses/by/4.0&rft_subject=Climate change&rft_subject=Conservation farming&rft_subject=Food security&rft_subject=Sustainable development&rft_subject=United States&rft_subject=Hawkesbury Institute for the Environment&rft_subject=SDG 2 Zero hunger&rft_subject=SDG 8 Decent work and economic growth&rft_subject=SDG 12 Responsible consumption and production&rft_subject=SDG 13 Climate action&rft_subject=SDG 17 Partnership for the goals&rft_subject=Agricultural land management&rft_subject=Agriculture, land and farm management&rft_subject=AGRICULTURAL, VETERINARY AND FOOD SCIENCES&rft_subject=Climate change science not elsewhere classified&rft_subject=Climate change science&rft_subject=EARTH SCIENCES&rft_subject=Evaluation, allocation, and impacts of land use&rft_subject=Terrestrial systems and management&rft_subject=ENVIRONMENTAL MANAGEMENT&rft.type=dataset&rft.language=English Access the data
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Global agricultural systems face one of the greatest sustainability challenges: meeting the growing demand for food without leaving a negative environmental footprint. United States (US) and China are the two largest economies and account for 39 % of total global greenhouse gases (GHG) emissions into the atmosphere. No-till is a promising land management option that allows agriculture to better adapt and mitigate climate change effects compared to traditional tillage. However, the efficacy of no-till for mitigating GHG is still debatable. In this meta-analysis, we comprehensively assess the impact of no-till (relative to traditional tillage) on GHG mitigation potential and crop productivity in different agroecological systems and management regimes in the US and China. Overall, no-till in China did not change crop yields, although soil CO2 (8 %) and N2O (12 %) emissions decreased significantly, while soil CH4 emissions increased by 12 %. In contrast to Chinese no-till, a significant improvement in crop yields (up to 12 %) was recorded on US cropland under no-till. Moreover, significant decreases in soil N2O (21 %) and CH4 (12 %) emissions were observed. Of the three cropping systems, only wheat showed significant reduction in CO2, N2O and CH4 emissions in the Chinese no-till system. In the case of US, no-till soybean-rice and maize cropping systems demonstrated significant emission reductions for N2O and CO2, respectively. Interestingly, yields of no-till maize in China and rice in US exceeded those of other no-till cereals. In China, no-till on medium-texture soils resulted in significant reductions in GHG emissions and higher crop yields compared to other soil types. In both countries, the relatively higher crop yields under irrigated versus non-irrigated no-till and the significant yield differences on fine textured soils under US no-till are likely due to the substantial N2O reductions. In summary, crop yield disparities from no-till between China and the US were related to the insignificant effects on controlling CH4 emissions and successfully mitigating N2O, respectively. This study comprehensively demonstrates how cropping system and pedoclimatic conditions influence the relative effectiveness of no-till in both countries.
The supporting data is published within the described article as supplementary materials. The full dataset is attached to this record.

Created: 2024-04-17

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Subjects
Agricultural, Veterinary and Food Sciences | Agricultural Land Management | Agriculture, Land and Farm Management | Climate change | Climate Change Science | Climate Change Science Not Elsewhere Classified | Conservation farming | Earth Sciences | Environmental Management | Evaluation, Allocation, and Impacts of Land Use | Food security | Hawkesbury Institute for the Environment | SDG 12 Responsible consumption and production | SDG 13 Climate action | SDG 17 Partnership for the goals | SDG 2 Zero hunger | SDG 8 Decent work and economic growth | Sustainable development | Terrestrial Systems and Management | United States |

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  • DOI : 10.26183/MNX2-E902
  • Local : research-data.westernsydney.edu.au/published/836903d0fc4311eebdaeff14b19ddd78
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