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许昌烟区,群众历来惯用芝麻饼作为烟田肥料,但是,多年来芝麻饼欠缺、基本上没有计划供应。而近年来可以作为烟田肥料的氮磷钾三要素复合化肥,也由于来源不一,产品质量没有保证,而且也供不应求。致使烟田施肥杂滥,甚至有用纯氮素化肥作为烟田肥料的,造成土壤含氮量过高,氮磷钾三要素营养不协调,不适应烟叶产质对营养代谢的要求。我们为寻求适宜烟叶生产的新肥源,自1975—1979年,在许昌地区生产资料公司和许昌地区化肥生产指挥部的协助支持下,开展腐植酸类肥料在烟草上的施用肥效试验。
Xuchang tobacco, the public has always been the usual sesame crackers as fertilizer, but sesame cake lack of years, basically no planned supply. In recent years, nitrogen, phosphorus and potassium can be used as tobacco fertilizer three elements of compound fertilizers, but also due to different sources, product quality is not guaranteed, but also in short supply. Resulting in excessive fertilization of tobacco fields and even use of pure nitrogen fertilizers as fertilizer for tobacco fields, resulting in excessive nitrogen content in the soil and uncoordinated nutrition of the three elements of NPK, which are not suitable for the requirements of nutrient metabolism of tobacco leaves. In order to find a new source of fertilizer suitable for tobacco leaf production, we conducted a fertilizer application experiment on the application of humic acid fertilizers to tobacco from 1975 to 1979 with the help of the production data company in Xuchang and the fertilizer production headquarters in Xuchang.