湖南农业大学学报（自然科学版）2025，Vol.51Issue(6)：1-9,9.DOI:10.13331/j.cnki.jhau.2025.06.001
不同水氮运筹模式对双季稻CH4排放及有机碳组分的影响
Effects of different water and nitrogen management patterns on CH4 emission and organic carbon components of double-cropping rice
摘要
Abstract
In order to explore the effects of different water treatments and nitrogen application levels and their interactions on CH4 emissions and soil organic carbon components of double-cropping rice,this study used early rice'Zhuliangyou 819'and late rice'Taiyou 390'as test materials,and set up a two-factor split plot experiment with water and nitrogen fertilizer.Water treatment was the main area,with two levels of conventional irrigation(W1)and water-saving irrigation(W2),nitrogen fertilizer treatment was the sub-area,with the nitrogen amount of 0(N0),120(N1),150(N2),180(N3)kg/hm2,CH4 emission flux,cumulative emissions,soil organic carbon(SOC),soluble organic carbon(WSOC),and biomass carbon(MBC)contents of different treatments were compared and analyzed,and the correlation between CH4 emission and soil organic carbon component content was analyzed.The results showed that compared with W1,W2 treatment effectively reduced CH4 emissions from rice fields,and W2N1 and W2N2 treatments showed better CH4 emission reduction effects;and with the increase of nitrogen fertilizer levels,CH4 emissions increased.W2 promoted the accumulation of soil organic carbon components.Especially at N2 level,SOC,WSOC and MBC contents were the highest,and the effect of W2N2 treatment was the most significant.There was a very significant positive correlation between CH4 emissions from rice fields and WSOC and MBC contents,but no significant correlation with soil SOC content.Comprehensive analysis shows that Adopting water-saving irrigation model combined with 150 kg/hm2 nitrogen treatment can effectively reduce CH4 emissions from rice fields while maintaining high soil organic carbon content,which is conducive to green and efficient rice production in Hunan's dual-cropping rice region.关键词
双季稻/水分管理/施氮水平/CH4排放/土壤有机碳组分Key words
double cropping rice/water management/nitrogen application level/CH4 emissions/soil organic carbon components分类
农业科技引用本文复制引用
滕容,彭美丹,傅志强,郑华斌,周传嘉,左锴,张秋平..不同水氮运筹模式对双季稻CH4排放及有机碳组分的影响[J].湖南农业大学学报（自然科学版）,2025,51(6):1-9,9.基金项目
国家重点研发计划项目(2022YFD2300305) （2022YFD2300305）
