河南省劳动模范、许昌县蒋李集公社岗城大队党支部付书记何丙建1982年试用磷钾肥,种烟2.5亩,总产1368斤。均价1.21元。共交售上等烟557斤,占40.72%,中等烟750斤,占54.82%。下等烟只占总产量的4.5%。近几年来,岗城大队的烤烟生产,化肥用量逐渐增多,土壤中氮素不断增加,氨磷钾比例失调,烟叶生长黑暴,内在品质急剧下降。为了改善烟叶品质,提高烤烟质量,何丙建刻苦钻研《烤烟栽培》等技术书籍,了解到烟叶是一种需要磷钾较多的作物、氮磷钾三要素对烟叶生长各自所特有的作用。于是,他改变常规的施肥方法。去年春天,何丙建在河南省农科院、许昌县科委等单位的协助和指导下,开始了增施磷钾肥的试验。为了取得第一手资料。首先对种烟的土壤进行了化验 Model worker in Henan Province, Xuchang County Jiang Liji Gangcheng gang brigade party secretary He Bingjian 1982 trial of phosphorus and potassium fertilizer, planting 2.5 acres, a total of 1368 pounds. The average price of 1.21 yuan. Total sales of 557 pounds of fine smoke, accounting for 40.72%, 750 kg of medium smoke, accounting for 54.82%. Downstream smoke accounted for only 4.5% of the total output. In recent years, Gangcheng brigade of flue-cured tobacco production, the amount of chemical fertilizer gradually increased, increasing nitrogen in soil, ammonia phosphorus and potassium imbalance, black-leaf tobacco growth, a sharp decline in intrinsic quality. In order to improve the quality of tobacco leaves and improve the quality of flue-cured tobacco, He Bingjian studied the technical books such as “Flue-cured Tobacco Cultivation” and learned that tobacco is a crop that needs more phosphorus and potassium. The three factors of nitrogen, phosphorus and potassium have specific effects on the growth of tobacco leaves. So, he changed the conventional method of fertilization. Last spring, He Bingjian started the experiment of increasing phosphorus and potassium fertilizer with the help and guidance of Henan Academy of Agricultural Sciences, Xuchang County Science and Technology Commission and other units. In order to obtain first-hand information. First of all, the tobacco soil was tested