【摘要】 系统报道了棉花高产、优质、低耗优化测土施肥中七大参数：每形成５０ｋｇ皮棉所需养分量、土壤供氮率（校正系数）。目标产量、肥料利用率、磷钾肥激发效应、氮磷钾肥后效、磷钾肥计算系数等。经田间试验和大面积示范推广，其准确度达９０．８２％，具有较大的可靠性，可作为棉花测土施肥使用。更多还原

【Abstract】 This paper systematically deals with seven parameters for the optimization of soil testing and fertilizer recommendation in cotton culture with high yiem, good quality at low cost,i.e. the amount of the nutrients needed by the production of per 50kg of lint,the rate of soil nitro-gen supply,the target yield,the fertilizer utilization coefficient, the phospho-potash primingaction, the subsequent effect of nitrogen,phosphonis and potassium fertilizers,and the ealcula-tion coefficient of phosphate and patassium fertilizers. Their accuracy is 90.82 %, which hasbeen proved by the results of field tests and large area application.So the parameters are reli-able and can be used in soil testing and fertilizer recommendation for cotton culture.更多还原