摘要：The application of struvite precipitation is not widespread for high cost.Toreduce the cost, struvite can be used as slow-release fertilizer. However,stru-vite is not suit for using as basic fertilizer for low nitrogencontent. Therefore,a new inorganic-organic adjuvant fertilizer was prepared. struvite was used as wrapper, and organic fertilizer as core. The results showed that the cumulative release rate, the primary dissolution rate and the differential dissolution of phosphorus and nitrogen have a similar upward trend with the increase of the weight rate of struvite. When the weight rate of struvite and the organic fertilizer was 3:1, the cumulative release rate of phosphorus and nitrogen were 37.444%,15.224%,respectively. The release amount of phosphate, TP and nitrogen at the weight rate of struvite:organic fertilize 2:1 were 5mg/L, 8mg/L and 3 mg/L, respectively. The results of isotope tracer technique showed that the value of dl5N/Nin vegetables root is reached to 160.8.It can be proved that nitrogen from struvite were ingested by vegetables, and most of which were ingested by vegetables roots.
