Lime Application Reduces Methane Emissions Induced by Pig Manure Substitution from a Double-Cropped Rice Field
文献类型: 外文期刊
作者: Liu, Jinsong 1 ; He, Yuxuan 1 ; Chen, Jin 2 ; Huang, Shan 1 ; Sun, Yanni 1 ;
作者机构: 1.Jiangxi Agr Univ, Minist Educ, Key Lab Crop Physiol Ecol & Genet Breeding, Nanchang 330045, Peoples R China
2.Jiangxi Acad Agr Sci, Jinggangshan Inst Red Soil, Jinggangshan Branch, Jian 343016, Peoples R China
3.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang 330200, Peoples R China
关键词: soil acidification; organic amendment; methane; nitrous oxide; rice yield
期刊名称:AGRICULTURE-BASEL ( 影响因子:3.3; 五年影响因子:3.5 )
ISSN:
年卷期: 2024 年 14 卷 7 期
页码:
收录情况: SCI
摘要: The substitution of chemical fertilizers with organic manure plays a critical role in sustainable crop production. Nevertheless, organic amendments promote the global warming potential (GWP) in rice paddies due to increased methane (CH4) emissions. Increasing evidence shows that lime application can reduce CH4 emissions from acidic paddy soils; however, it is still not clear whether liming can reduce the GWP in rice fields under organic manure substitution. A two-year field experiment was conducted to investigate the impacts of pig manure substitution and lime application on grain yield, CH4 and nitrous oxide (N2O) emissions in a subtropical double-cropped rice field in China. The experiment consisted of three treatments: CF (100% chemical nitrogen fertilizer), 1/2N + M (50% of the applied nitrogen substituted by pig manure, M represents manure), and 1/2N + M + L (lime amendment with 50% of the applied nitrogen substituted with pig manure, L represents lime). On average, 1/2N + M reduced rice yield by 5.65% compared to CF, while the lime application had no effect on rice yield. Mean cumulative CH4 emissions were 218.8% higher in 1/2N + M than in CF, whereas 1/2N + M + L reduced CH4 emissions by 36.6% compared to 1/2N + M. Neither pig manure substitution nor lime application affected N2O emissions. Consequently, 1/2N + M increased the GWP and greenhouse gas intensity (GHGI) by 214.6% and 228.3%, respectively, compared to CF. In contrast, 1/2N + M + L reduced the GWP and GHGI by 36.4% and 36.5% compared to 1/2N + M. Lime application can mitigate CH4 emissions and GWP induced by pig manure amendment in double-cropped rice fields.
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