Опубликована: Ноя. 2, 2023
Rice provides ~20% of human dietary energy and, for many people, a similar share their protein. cultivation, however, produces significant greenhouse gas (GHG) emissions, comparable to those from the aviation sector. The main GHG rice production is methane, mostly result conventional cultivation (CRC) keeping fields continuously flooded during crop cycle. There extensive evidence that alternate wetting and drying (AWD) substantially reduces methane emissions. AWD one component System Intensification (SRI), an agroecological approach management plants, water, soil nutrients practiced by millions farmers in both lowland irrigated upland rainfed cultivation. Thirteen countries have included SRI Nationally Determined Contributions reduction or climate change mitigation. This article reviews 16 field studies net emissions adoption AWD, eight SRI, two compared AWD. Where available, review includes data on yield therefore carbon dioxide-equivalent per kilogram produced. indicates offer substantial (~35–41%) hectare with However, offers ~66% greater than CRC, rice, ~54% more limited directly comparing support this finding. also appears potential sequester soil. lowers farmers’ costs production, adds income can make climate-friendly methods attractive. Both are greatly preferable current practices, but opportunities contribute food security while addressing drivers change.
Язык: Английский