Fecha de publicación: 12/03/2021 Fuente: Wipo Tobacco Agriculture The invention discloses a water and fertilizer integrated method for reducing drip irrigation tobacco field N2O emission. The water and fertilizer integrated method comprises the following steps of 1)first-time drip irrigation fertilization, specifically, after tobacco plants are transplanted for 7-14 days, 15%-25% of the total amount of water-soluble fertilizer is applied in a drip irrigation manner, and the concentration of the water-soluble fertilizer is controlled to be 0.2%-0.4% for drip irrigation; 2) second-time drip irrigation fertilization, specifically, after the tobacco plants aretransplanted for 28-35 days, 40%-50% of the total amount of water-soluble fertilizer is applied in a drip irrigation manner, and the concentration of the water-soluble fertilizer is controlled to be 0.4%-0.6% for drip irrigation; and 3) third-time drip irrigation fertilization, specifically, after the tobacco plants are transplanted for 42-49 days, 30%-40% of the total amount of water-soluble fertilizer is applied in a drip irrigation manner, and the concentration of the water-soluble fertilizer is controlled to be 0.6%-0.8% for drip irrigation. By means of the water and fertilizer integratedmethod, the flue-cured tobacco nitrogen utilization rate can be effectively increased, and the tobacco field N2O emission is remarkably reduced. Nutrient absorption of flue-cured tobaccos is promoted,the biomass of the tobacco plants is increased, the yield and quality of tobacco leaves are improved, economic benefits of the tobacco leaves are improved, and environmental risks caused by nutrientresidues can be reduced.