Nghiên cứu ảnh hưởng của quản lý nước mặt ruộng đến phát thải khí N2O trên đất phù sa sông Hồng không được bồi hàng năm trồng lúa ở tỉnh Hưng Yên

Abstract

The study on the effect of irrigation regime on N₂O emission in the annual alluvial soil of the Red River without sedimentation used for rice cultivation was experimentally studied on a scale of 50.2 ha in Phu Thinh commune, Kim Dong district, Hung Yen province for 3 years (2015 - 2017). The results have determined that the soil in the study area has a strong reducing property (Eh < - 100 mV), neutral pH is a favorable environment for the formation and emission of N₂O, the largest in the Eh value range from -100 mv to – 200 mv and pH from 6 -8. N₂O emissions for each growth and development stage of rice on the alluvial soil of the Red River, in which the growth stage from transplanting to tillering has the largest amount of N₂O. Emissions of the irrigation regimes according to the traditional irrigation formula, dry medium and dry are all very low, ranging from 0.3 to 0.4 ppm. The studied field surface water regime did not affect N₂O emissions.