The invention relates to a method and application of spartina alterniflora hydrothermal carbon in preventing and controlling
ammonia volatilization of soil in a coastal salinized area and improving
soil quality, and belongs to the technical field of
agriculture. According to the present invention, the two-phase
catalysis preparation method using the spartina alterniflora as the
biomass and adopting the bimetallic / clay mineral has advantages of short reaction time, low
energy consumption, large product specific surface area and no aging; when the hydrothermal carbon is applied to coastal area salinized soil, the soil
ammonium nitrate conversion process is influenced by adsorbing NH4 < + > in the soil and improving the
metabolic activity of microorganisms, and the
ammonia volatilization of the salinized soil is reduced by 59.0% or above; meanwhile, the
total nitrogen content of the soil is increased to 57.6%-60.4%, and the utilization efficiency of the
nitrogen fertilizer is remarkably improved. Besides, the hydrothermal carbon effectively increases the content of organic matters in soil by 204.6% and has a certain
promotion effect on the rice yield, and the rice yield can be respectively increased by 12.0% and 10.6% by the application amount of the spartina alterniflora hydrothermal carbon of 0.5% and 1.5%. In combination with an
ammonia volatilization inhibition effect and a rice yield increasing effect, 0.5% of hydrothermal carbon application amount is recommended. The method is suitable for the
agricultural land in the
saline soil area with the requirements for preventing and controlling non-
point source pollution and improving the
soil quality.