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| Impact of compound addition of biochar, nitrification inhibitor, and urease inhibitor on greenhouse gas emissions |
| Received:November 11, 2021 Revised:January 29, 2022 |
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| KeyWord:biochar;nitrification inhibitor;urease inhibitor;greenhouse gas |
| Author Name | Affiliation | E-mail | | TAO Zhen | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | LI Zhongyang | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
National Research and Observation Station of Shangqiu Agro-ecology System, Shangqiu 476000, China | | | LI Songjing | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | LI Baogui | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | LI Siyi | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | GAO Feng | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | LIU Yuan | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | liuyuanfiri88@163.com |
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| Abstract: |
| To investigate the effects of the addition of exogenous biochar, nitrification inhibitors, and urease inhibitors on greenhouse gas emissions, an indoor incubation method was employed and combinations of exogenous substances were as follows:control(CK), biochar (BC), nitrification inhibitor(NP), urease inhibitor(NB), BC+NP(BCNP), BC+NB(BCNB), NP+NB(NPB), and BC+NP+NB(BCNPB). The greenhouse gas emissions from the soil, as well as the soil pH changes, NH + 4-N, and NO-3-N in these treatments were monitored. The results demonstrated that compared with CK, each treatment basically suppressed soil N2O emission with NPB being the most efficient treatment; all treatments promoted soil CO2 emission except the BC treatment; the effects on soil CH4 emission were generally similar to the CO2 results. All treatments, but BC, BCNB, and BCNPB had an inhibitory effect on the global warming potential to some degree, and the NPB treatment worked best. At the end of the incubation, compared with CK, except for the NP treatment, which increased the soil pH, all the other treatments decreased the pH; in terms of inorganic nitrogen content in the soil, compared with the CK, all treatments increased the NH + 4 -N content, whereas the NB, BC, BCNP, and BCNB treatments increased the NO-3-N content, whereas the BCNPB, NP, and NPB treatments reduced the NO-3-N content. Considering the effects of both global warming potential and soil properties, the treatment of the nitrification + urease inhibitors in the study is the optimal choice to suppress greenhouse gas emissions. |
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