Long-Term P Fertilizer Application Reduced Methane Emissions from Paddies in a Double-Rice System
文献类型: 外文期刊
作者: Zhu, Xiangcheng 1 ; Li, Jin 3 ; Liang, Xihuan 2 ; Chen, Yunfeng 1 ; Chen, Xianmao 2 ; Ji, Jianhua 2 ; Xia, Wenjian 2 ; Lan, Xianjin 2 ; Peng, Chunrui 2 ; Chen, Jin 2 ;
作者机构: 1.Yichun Univ, Coll Life Sci & Resource Environm, Yichun 336000, Peoples R China
2.Jiangxi Acad Agr Sci, Natl Engn & Technol Res Ctr Red Soil Improvement, Minist Agr & Rural Affairs,Natl Agr Expt Stn Agr, Key Lab Crop Ecophysiol & Farming Syst Middle & L, Nanchang 330200, Jiangxi, Peoples R China
3.Nanchang Normal Univ, Sch Tourism & Econ Management, Nanchang 330032, Jiangxi, Peoples R China
4.Jiangxi Acad Agr Sci, Jinggangshan Branch, Jinggangshan Inst Red Soil, Jian 343016, Peoples R China
关键词: CH4 emissions; phosphorus; long-term; methanogens; methanotrophs; paddy soil
期刊名称:AGRONOMY-BASEL ( 影响因子:3.949; 五年影响因子:4.117 )
ISSN:
年卷期: 2022 年 12 卷 9 期
页码:
收录情况: SCI
摘要: Rice is the main staple food worldwide, yet paddy fields are a primary source of artificial methane (CH4) emissions. Phosphorus (P) is a key element in the growth of plants and microbes, and P fertilizer input is a conventional agricultural practice adopted to improve rice yield. However, the impact of long-term P fertilizer addition on CH4 emissions in rice paddies is still unclear. To test this impact, a 36-yr field experiment with and without P fertilizer application treatments under a double-rice cropping system was used in this study to explore how continuous P application affects CH4 emissions and related plant and soil properties. The cumulative CH4 emissions were 21.2% and 28.6% higher without P fertilizer application treatment than with P fertilizer application treatment during the early and late season, respectively. Long-term P fertilizer application increased the rice aboveground biomass by 14.7-85.1% and increased grain yield by 24.5-138.7%. However, it reduced the ratio of root biomass to aboveground biomass. Long-term P fertilizer input reduced the soil NH4+ concentrations in both rice seasons but increased the soil DOC concentrations in the late season. The soil methanogenic abundance and CH4 production potential were similar without and with P fertilizer application treatments; however, the methanotrophic abundance and soil CH4 oxidation potential with P fertilizer application treatment were significantly higher than without P fertilizer application treatment. Our findings indicate that long-term P fertilizer input reduces CH4 emissions in rice fields, mainly by improving CH4 oxidation, which highlights the need for judicious P management to increase rice yield while reducing CH4 emissions.
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