宿县地区从六十年代初期,就在北部沙土地区推广施用磷肥(指过磷酸钙,以下简称磷肥),增产效果明显;七十年代后期,我区中部砂姜黑土地区通过试验对比,发现施磷增产效果也十分明显。因而施磷面积迅速扩大,掀起了施用磷肥的热潮。1980年秋种时,不仅中部地区,而且北部和沿淮也普遍施用,全区秋种磷肥用量约15万吨,平均每亩35斤左右。有力地促进了小麦生产的发展。但随着面积的扩大 From the early 1960s, Su County promoted the use of phosphate fertilizer (referring to superphosphate, hereinafter referred to as “phosphate fertilizer”) in the northern sand areas for obvious stimulation effects. In the late seventies, The phosphorus production effect is also very obvious. Therefore, the rapid expansion of phosphorus area, set off a wave of phosphate fertilizer. In the fall of 1980, not only the central region, but also the north and along the Huai River is also commonly used, the region autumn phosphorus fertilizer consumption of about 150,000 tons, an average of 35 pounds per mu. Effectively promoted the development of wheat production. But with the expansion of the area