目前,在棉花施肥上存在着三个弊病:一是偏爱氮肥;二是喜欢催苗;三是干施化肥。常造成棉株枝高叶大,通风透光不良,脱落严重,增肥不增产。为此,必须纠正以上施肥缺点,改单施氮肥为氮磷肥配合施用;改苗期大水大肥催苗为重施花铃肥;改干施化肥为水施,再配合其他栽培技术,从而促进棉花高产。简阳县新市公社花鹿六队的施肥调查很能说明问题。这个队,1975—1976两年共施氨水37吨,每亩还施了脲素和碳酸氢铵。以纯氮计算,每年每亩施氮素37斤,而且集中施在开花前。磷肥用得很少,折合亩施五氧 At present, there are three drawbacks in cotton fertilization: one is the preference for nitrogen fertilizer; the second is like reminder seedlings; the third is dry chemical fertilizers. Often caused by cotton plant branches high leaves, poor ventilation and light, shedding serious, fattening does not increase production. To this end, we must correct the shortcomings of the above fertilizers, a single application of nitrogen and nitrogen for the application of nitrogen and phosphorus fertilizer; seedling replacer of large water and fertilizer to re-Huaping boll fertilizer; dry fertilizer to water facilities, coupled with other cultivation techniques, thereby promoting cotton high yield. Jianyang County commune Shulu six teams fertilization survey is very illustrative. The team, 1975-1976 a total of ammonia water 37 tons, also applied urea per mu and ammonium bicarbonate. Calculated with pure nitrogen, 37 kg of nitrogen per acre per year, and concentrated facilities before flowering. Phosphate fertilizer used very little, equivalent to five acres of applied oxygen