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磷肥多属迟效性肥料,当年利用率较低,施用中又受各种条件制约,直接影响肥效的发挥,所以磷肥多用作基肥和种肥,施肥方法也要讲究: 1.要考虑土壤有效磷含量。据测定,亩产300-500斤小麦的地块,有效磷在10ppm以下为缺磷,施磷显著增产;20ppm为中等,施磷肥要适量;30ppm以上不需施磷肥。 2.要根据作物生理特性施用。
Phosphate fertilizers are mostly delayed-acting fertilizers, when the utilization rate is low, the application is subject to a variety of conditions, which directly affect the efficiency of fertilizer play, so the phosphate fertilizer used as a base fertilizer and fertilizer, fertilization methods should also pay attention to: 1. To consider the effective soil Phosphorus content. According to the determination, 300-500 kg per mu yield of wheat plots, phosphorus is less than 10ppm in the phosphorus deficiency, phosphorus production increased significantly; 20ppm is medium, phosphate fertilizer to be appropriate; 30ppm above without phosphate fertilizer. 2. According to the physiological characteristics of the crop application.