本文采用多点田间试验和调查研究相结合的方法,重点对土壤碱解氮测定值与无肥区烟叶产量的相关性,烟叶单位产量所需养分量、土壤供氮率(换算系数)、肥料利用率、磷钾肥激发效应、饼肥与氮磷钾化肥联因效应等参数进行了详尽的研究,经大面积示范与推广,其准确度达91.72%.本文首次报道了烤烟优质适产测土施肥公式中的几个参数,实践证明,上述参数具有可靠性,可作为烟草测土施肥参考使用. In this paper, a combination of multi-point field trials and research methods, focusing on soil available nitrogen determination of the value and non-fat zone tobacco production, the required amount of tobacco leaf yield, soil nitrogen supply (conversion factor), fertilizer Utilization rate, phosphorus and potassium excitation effect, cake fertilizer and nitrogen, phosphorus, potassium fertilizer effect and other parameters of a detailed study, the large-scale demonstration and promotion, the accuracy of 91.72% .This paper reports for the first time flue- Several parameters in the formula, practice has proved that the above parameters are reliable and can be used as a reference for tobacco soil testing and fertilization.