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采用连续水浸提、盆栽试验,研究不同温度下两种促释材料活化的磷矿粉磷素动态释放特性及肥效。结果表明:(1)与磷矿粉相比,促释磷矿粉连续浸提水溶性磷累积量显著提高;提高幅度最大的是经加温处理的WZ促释磷矿粉,较未加温处理提高了42.95%,是磷矿粉的2.13倍。表明活化磷矿粉经加温处理能明显促进磷矿粉水溶性磷的释放。(2)促释磷矿粉肥效显著优于磷矿粉,WZ处理效果较佳,加温处理后肥效最佳,不亚于SP。
Continuous flooding and pot experiment were conducted to study the dynamic release characteristics and fertilizer efficiency of phosphorus phosphate activated by two kinds of release-enhancing materials at different temperatures. The results showed that: (1) Compared with phosphate rock, the cumulative amount of water-soluble phosphate released by the sustained-release phosphate rock significantly increased; the most significant increase was the temperature-treated WZ phosphate rock phosphate, Processing increased by 42.95%, is 2.13 times that of phosphate rock. It is indicated that the activated phosphate rock can obviously promote the release of water-soluble phosphorus from the phosphate rock by heating. (2) The effect of releasing-releasing phosphate rock powder is better than that of rock phosphate powder. The WZ treatment is better and the best fertilizer effect after heating is as much as SP.