Research on the preparation of slow-release fertilizer and its slow-release performance by compounding biochar with Yellow River sediment
The Yellow River produces a large amount of sediment in the process of dredging and treatment.Resource utilization and harmless treatment of these sediments have become an important part of the Yellow River management.This study combined Yellow River sediment with biochar to prepare a composite slow-release fertilizer particle,and investigated the influence law and mechanism of different factors,such as sediment content,bentonite content,and carbon fertilizer ratio on the slow-release performance of the particle fertilizer.The results show that the hydrogen bond strength between materials can be effectively regulated by changing the material ratio and introducing bentonite,which can enhance the compressive strength of granular fertilizer,and improve its slow-release effect;The optimized formulation of the slow-release performance of granular fertilizer was 16.67%of biochar,33.33%of urea,40.00%of Yellow River sediment,and 10%of bentonite.During the first 4 days of the soil column test,which is the stage of releasing a large amount of nutrients,the nutrient release rate of granular fertilizer is lower than that of commercially available compound fertilizer and commercially available coated slow-release fertilizer products.The research results can provide a new approach for the utilization of Yellow River sediment resources.
Yellow River sedimentbiocharslow-release fertilizerbentoniteureahydrogen bondsoil column test
万方数据
维普
