Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 Datun Road, Beijing, 100101, China; Shandong Yucheng Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
Chinese Research Academy of Environmental Sciences, Beijing, China.
Environ Pollut. 2022 Sep 15;309:119747. doi: 10.1016/j.envpol.2022.119747. Epub 2022 Jul 11.
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 CO and NO 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 CH uptake. In this study, soil was a source of CO and NO but a sink for CH. The effect of soil temperature on the fluxes of CO was more pronounced than that of soil moisture. However, soil temperature and soil moisture had a weak correlation with CH and NO 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.
农业耕作方式对温室气体（GHG）的产生和消耗有重大影响，而温室气体是全球变暖的主要原因。本研究比较了两种耕作方式，即传统耕作（CT）和免耕（NT），以评估它们对温室气体排放的影响。从 2018 年到 2020 年的平均数据来看，与 CT 相比，NT 可使 CO 和 NO 排放分别显著减少 7.4%和 51.1%。此外，NT 还被发现抑制了土壤 CH 的吸收。在本研究中，土壤是 CO 和 NO 的源，但 CH 的汇。土壤温度对 CO 通量的影响比土壤湿度更为显著。然而，土壤温度和土壤湿度与 CH 和 NO 通量变化的相关性较弱。与 CT 相比，NT 没有影响玉米产量，但却显著降低了 8.07%的全球变暖潜势（GWP）。对于产量标准化的 GWP，NT（9.63）和 CT（10.71）之间没有显著差异。综上所述，在测试条件下，NT 是一种有利于环境的耕作方式，可以减少土壤中的温室气体排放。
