Nutrient Release Characteristics of Zeolite Coated Urea Fertilizer and Effect on Soybean

In order to study the slow-release mechanism of zeolite coated urea fertilizer and improve nitrogen fertilizer utilization efficiency, ordinary urea was used as the fertilizer core, zeolite minerals as the coating material, and polycarboxylic methyl cellulose sodium as the binder,and two types of zeolite coated urea fertilizers were prepared. Indoor and field experiments were combined to set up four soil fertilizer nutrient treatments, and the slow-release performance of the fertilizer was studied through leaching experiments; Field experiments were conducted to investigate the effects of zeolite coated urea applied to soil on the biological and agronomic efficiency of soybeans. The results showed that the application of 10% zeolite coated urea reduced the accumulation of total nitrogen, nitrate nitrogen, and ammonium nitrogen leaching concentrations in soil by 10.52%, 1.64%, and 46.22%, respectively. The application of 20% zeolite coated urea fertilizer reduced the accumulation of total nitrogen, ammonium nitrogen, and nitrate nitrogen leaching concentrations in the soil by 19.83%, 18.97%, and 23.22%, respectively. The application of zeolite coated urea promoted soybean growth. Among them, the application of 20% zeolite coated urea significantly improves soybean yield and agronomic efficiency while reducing nitrogen fertilizer by 20%.（Application） Using zeolite coated urea reduces urea nitrogen leaching and prolongs urea fertilizer efficiency.