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目前有的地区,由于增施磷肥,产量大幅度的提高,但有的地区连续地大量地施用磷肥,结果经济效益不高。磷肥怎样施用为好,总结以下几点供参考。一、依据土壤肥力情况合理施用土壤供磷状况是决定磷肥效果的重要条件,土壤供磷状况包括供磷的容量和强度。容量指土壤全磷的含量,强度主要是指土壤有效磷含量。其中主要的因素是有效磷含量的多少,土壤有效磷含量愈低,磷肥增产效果就愈大。根据大田试验结果,在施用氮肥的基础上,磷肥肥效与土壤有效磷含量的关系如表
In some areas, due to the increased application of phosphate fertilizer, the yield has been greatly increased, but in some areas, phosphate fertilizer has been applied continuously in large quantities, resulting in low economic returns. How to use phosphate as well, summarize the following points for reference. First, according to the situation of soil fertility reasonable application of soil phosphorus status is an important condition to determine the effect of phosphate fertilizer, soil phosphorus status, including the capacity and intensity of phosphorus. Capacity refers to the content of soil total phosphorus, the strength is mainly refers to the soil available phosphorus content. One of the main factors is the amount of available phosphorus, the lower the content of available phosphorus, phosphate fertilizer yield greater. According to field test results, based on the application of nitrogen fertilizer, the relationship between fertilizer efficiency and soil available phosphorus content is shown in the table