小麦的磷肥施用问题,是一个复杂的问题。世界各国施用磷肥的研究指出:有的地方效果显著,有的收效甚微,有的甚至无效。近年加拿大、苏联、美国、日本对此已引起重视,通过数十个试验,根据小麦植株内P_2O_5 The problem of phosphorus fertilizer application in wheat is a complicated issue. The research on the application of phosphate fertilizer in various countries in the world points out that some places have notable effects and some have little or no effect. In recent years, Canada, the Soviet Union, the United States and Japan have drawn great attention to this. Through dozens of experiments, according to P_2O_5