磷素是植物的三大营养元素之一,与农作物的生长发育及产量品质关系极大。鄂北岗黄土地区土壤含磷量低。据近年普查结果,襄、枣两县土壤速效磷低于10ppm的缺磷面积占耕地总面积的90％;枣阳县七方公社有耕地17万多亩,缺磷面积占97％,成为发展农业生产的一大障碍。为了研究不同土壤类型上小麦磷肥的适宜施用量,1981年秋播时在七方公社大店六、七两队进行了以 Phosphorus is one of the plant’s three major nutrients, and crop growth and yield and quality of great relationship. The content of phosphorus in Loess Plateau of Hubei Province is low. According to the census results in recent years, Xiang, jujube counties of soil available phosphorus less than 10ppm phosphorus area accounts for 90% of the total area of ​​arable land; Zaoyang County Qifang commune has 170,000 mu of cultivated land, phosphorus area of ​​97%, a development A major obstacle to agricultural production. In order to study the appropriate application rates of wheat P fertilizers on different soil types, in autumn 1981 broadcast in seven large commune six or seven teams were carried out to