Abstract
Chemical synthetic slow release fertilizer had become a major breakthrough in the green fertilizer industry due to its superior nutrient management and degradation properties. However, the traditional chemical synthetic slow release fertilizers contain only nitrogen and consume high energy during drying. Herein, a low cost green chemical synthetic slow release fertilizer (PSRF/KCl) was prepared from urea, formaldehyde and diammonium phosphate by spray drying method. Compared with the traditional drying process, the comprehensive energy consumption is reduced by 38.13%. The SEM, FTIR, and TG characteristics of PSRF/KCl showed that it has excellent water solubility, special morphological characteristics and thermal properties. In addition, the application of PSRF/KCl in Chinese cabbage showed that PSRF/KCl could increase the yield by 26.2%. All the results showed that PSRF/KCl is a green chemical synthetic slow release fertilizer, which has broad application prospects in modern sustainable agriculture, and its matching spray drying process can effectively reduce production costs.
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