Application of phosphorus tailings in compound fertilizer
The comprehensive development and rational utilization of phosphorus tailings has always been a prominent problem that urgently needs to be solved in China's phosphate rock industry.By adding phosphorus tailings to compound fertilizers instead of phosphogypsum,the application effect of compound fertilizers is explored through analysis of the physical properties and field fertilization efficiency.The results show that the particle disintegration of the 15-5-5 compound fertilizer is increased when added phosphorus tailings,the nutrient release rate is faster,and the uptake of phosphorus,calcium,and magnesium by corn seedling plants increases,however,potassium is lost in the soil,leading to a decrease in plant uptake.Compared to adding phosphogypsum,the disintegration of the 13-5-7 compound fertilizer added phosphorus tailings is improved slightly,and the uptake of potassium by plants is increased.
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