根据湖北汉阳县棉田施肥经验,只有施足底肥分期追肥才能获得增产,如果以追肥代底肥,或只底肥不追肥都会减产。如侏(?)公社成功管理区国光生产队在施足底肥(每亩施灰粪40担、塘土500担、地皮土100担)分期追肥(苗、蕊、花各追肥一次,每亩共计水粪30担)的棉田里亩产籽棉552.1斤;该公社试验站有块棉田只底肥不追肥(底肥同上)亩产籽棉444斤。红星生产队有块棉田只追肥不底肥(追肥与上同)亩产籽棉只 According to the fertilization experience of cotton field in Hanyang County, Hubei Province, only the topsoil fertilizer staged top dressing can be increased production, if top dressing fertilizer, or only the bottom fertilizer will not reduce fertilizer will be. Such as the dwarf (?) Commune success management area Guoguang production team at the end of the application of fertilizer (40 acres of soil manure Shi Tu, 500 Tam, terra cotta 100 Tam) topdressing stage (seedlings, Rui, spent each top dressing, Water-dung 30 Tam) in the cotton fields per acre seed cotton 552.1 kg; the commune pilot station has a base of cotton only does not top-dressing fertilizer (base fertilizer Ibid) mu 464 kg of seed cotton. Red Star production team has a cotton paddy only top-dressing no fertilizer (top dressing with the same) per acre seed cotton only