磷肥在不少地区农业生产上的意义并不逊于氮肥。但因施磷肥后,作物在叶色,生长势方面的变化不如施氮肥明显,故往往被忽视。1979年全区磷肥用量9万吨,只占氮肥用量的19.5%。最近连续几年在我区农业生产上,出现实产低于估产,作物普遍表现“长得凶,打得空”,籽实不饱满,千粒重下 Phosphate fertilizer in many areas of agricultural significance is not inferior to nitrogen fertilizer. However, due to the application of P fertilizers, crops in the leaf color, growth potential changes as nitrogen fertilizer significantly, it is often overlooked. In 1979, the area used 90,000 tons of phosphate fertilizer, accounting for only 19.5% of the amount of nitrogen fertilizer. For several years in recent years in our area of ​​agricultural production, real production below estimated yield, the general performance of crops, “grow fierce, play empty”, the seeds are not full, a thousand weight