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确定土壤磷肥施用量的方法已有多种,但是简单、快速、易行的方法笔者认为肥料磷回收量法或称土壤需磷系数法尚好,此法与磷肥指数法原理相似。目前有学者通过研究,建议采用此法来拟订土壤的磷肥用量。故本试验拟通过温室模拟,研究确定出灌淤土对磷肥的回收量(或需磷系数),为合理施用磷肥提供科学依据。
There are many ways to determine the amount of soil phosphate fertilizer application, but the simple, fast and easy method I think fertilizer phosphorus recovery method or soil phosphorus demand method is still good, this method is similar to the principle of phosphorus index method. At present, some scholars study and suggest that this method should be used to formulate the amount of phosphate fertilizer in the soil. Therefore, this experiment is going to simulate the greenhouse and study to determine the amount of phosphate fertilizer (or phosphorus required) for silt irrigation so as to provide a scientific basis for the rational application of phosphate fertilizer.