Methane efflux in rice paddy field under different irrigation managements

Revista Brasileira de Ciência do Solo

Diovane Freire Moterle²  Leandro Souza Da Silva¹  Vagner João Moro¹  Cimélio Bayer¹  Tiago Zschornack¹  Luis Antonio De Avila¹  Ângela Da Cas Bundt¹ 

[1] ,Instituto Federal do Rio Grande do SulBento Gonçalves RS

关键词: greenhouse gas;    flooding irrigation;    intermittent irrigation;    redox potential;    gás de efeito estufa;    irrigação por alagamento;    irrigação intermitente;    potencial redox;   

DOI  :  10.1590/S0100-06832013000200014

来源: SciELO

【 摘 要 】

Paddy rice fields may contribute to methane (CH4) emission from soil due to anaerobic conditions after flooding. Alternatives to continuous flooding irrigation in rice have been developed to mitigate CH4 efflux into the atmosphere. This study aims to investigate the effects of irrigation managements in the CH4 efflux during the rice growing season. An experiment was carried out at in Santa Maria, Rio Grande do Sul State, Brazil, during 2007/08 and 2009/10 growing seasons. The treatments were continuous flooding and intermittent irrigation in 2007/08 and continuous flooding, intermittent irrigation and flush irrigation in 2009/10. Intermittent irrigation is effective in mitigating CH4 efflux from rice fields when climatic conditions enable water absence during cultivation, but its efficiency depends on the electrochemical soil conditions during the flooding cycles.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License