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磷素是冬小麦的重要营养元素之一。在五十年代,由于我省农田耕作长久,土壤有机质、全氮量均不高,因此氮素是冬小麦生产的限制因素,施氮肥普遍有效。我省土壤含磷量一般较高,故在大部分土壤上,冬小麦施磷肥无效。六十年代以后,随着农业生产的发展,小麦产量的不断提高,氮素化肥施用量的增加,复种指数的不断提高,磷肥在一些土壤上开始成为冬小麦生产的限制因素,所以人们对施用磷肥增产效果的研究逐步深入。现将在商丘县五里杨大队,对冬小麦施用磷肥的试验结果,整理于下。
Phosphorus is one of the important nutrition elements of winter wheat. In the 1950s, due to long-term cultivation of farmland in our province, soil organic matter and total nitrogen content were not high, so nitrogen was the limiting factor for winter wheat production and nitrogen fertilizer was generally effective. Soil phosphorus in our province is generally high, so in most of the soil, winter wheat phosphate application ineffective. Since the 1960s, with the development of agricultural production, the continuous increase of wheat yield, the increase of nitrogen fertilizer application and the improvement of multiple cropping index, the phosphate fertilizer began to become the limiting factor of winter wheat production in some soils. Therefore, Increasing the effect of research gradually. Will be in Shangli County Wuli Yang brigade, the experimental results of phosphate fertilizer on winter wheat, sorted in the next.