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利用促释材料对中低品位磷矿粉进行活化,并通过连续水浸提、盆栽试验,研究活化磷矿粉的磷素动态释放特性和肥效。结果表明:与磷矿粉相比较,两种促释磷矿粉连续浸提的水溶性磷累积量分别是磷矿粉处理的1.46、2.53倍;促释磷矿粉的玉米生物量、吸磷量显著高于磷矿粉处理,其中SMS活化磷矿粉的玉米生物量最高,与过磷酸钙肥效相当。
The low-grade phosphate rock was activated by using the release-promoting material, and the dynamic phosphorus release characteristics and the fertilizer effect of the activated phosphate rock were studied through continuous water-leaching and pot experiment. The results showed that compared with the phosphate rock, the cumulative amount of water-soluble phosphorus in continuous extraction of two kinds of phosphate rock was 1.46 and 2.53 times that of phosphate rock treatment respectively; The content of SMS was significantly higher than that of phosphate rock, of which SMS activated phosphate rock had the highest biomass of maize and had the same effect as superphosphate.