Wood vinegar and biochar co-application mitigates nitrous oxide and methane emissions from rice paddy soil: A two-year experiment

文献类型： 外文期刊

第一作者： Feng, Yanfang

作者： Feng, Yanfang;Li, Detian;Xue, Lihong;Zhou, Beibei;Yang, Linzhang;Sun, Haijun;Sun, Haijun;Liu, Jiayou;Feng, Yanfang;Xue, Lihong;Sun, Haijun;Zhou, Beibei;Feng, Yanfang;Xing, Baoshan

作者机构：

关键词： Atmospheric environment; Biochar; GHGI; Greenhouse gases; Waste recycle and reuse; Pyroligneous acid

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2020 年 267 卷

页码：

收录情况： SCI

摘要： Both biochar (BC) and wood vinegar (WV) influence the nitrous oxide (N2O) and methane (CH4) emissions from agricultural systems. However, the impacts of BC and WV co-application on rice production, N2O and CH4 emissions are not well documented. We here conducted a two-year soil columns experiment with four treatments: WV (5 t WV ha(-1)), BC (7.5 t BC ha(-1)), WV + BC (5 t WV ha(-1) +7.5 t BC ha(-1)) and a control (no treatment). The results showed that BC and WV + BC produced higher rice grain yield than the control by 14.1-15.9% in 2016 and by 4.1-5.2% in 2017, respectively. While WV increased rice grain yield by 11.2% in 2016, it had no significant influence on yield in 2017. Both WV and BC significantly mitigated N2O emissions by 22.4-41.8% in 2016 and 22.4-36.9% in 2017, respectively. Interestingly, WV + BC treatment showed the highest N2O mitigation efficiency, with a 52.9-62.8% mitigations in 2016 and 2017. Furthermore, the co-application of WV and BC significantly mitigated CH4 emissions by 42.6% in 2016 and 35.3% in 2017, respectively, while applying WV or BC alone had no annually-consistent mitigation effect on CH4 emissions. Overall, GWPt of rice growth cycle was most significantly suppressed by WV + BC with a 48.7-56.1% reduction, followed by WV and BC with 20.4-28.0% and 19.7-35.7% reductions, respectively. Consequently, the WV + BC treatment had the highest GHGI mitigation effect, averaging with 56.7% over two consecutive rice growth cycles. In conclusion, co-application of WV and BC is recommended for rice cultivation, which can both improve rice yield and minimize GHG emissions. (c) 2020 Elsevier Ltd. All rights reserved.

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