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中文摘要：
为了探讨“3414”方案在烤烟施肥中的应用和正宁县烤烟的合理施肥量，通过田间试验研究了正宁县烤烟“3414”方案的施肥效果和推荐用量。结果表明，当三元二次肥效模型不能对“3414”试验结果进行拟合时，采用一元二次肥效模型拟合，可以较好地反映产量与施肥量之间的关系；氮、磷肥效应函数属典型模型，钾肥效应函数属非典型模型；结合经济效益分析，可以看出本试验条件下当地烤烟种植的经济最佳氮、磷和钾施用量分别为56 kg·hm-2、78 kg·hm-2和270 kg·hm-2
英文摘要：
The experiment was conducted in Zhengning County ,Gansu Province to study the effects of“3414”fer-tilization program and fertilizer recommendation for flue-cured tobacco .The results showed that the one-factor quadratic models could reflect well the relationship between yield and fertilization rate .The effect functions of N and P were typical models ,while the effect function of K was a typical model .According to the economic analysis ,the optimal application rate of N ,P and K for flue-cured tobacco was 56 kg·hm-2 ,78 kg·hm-2 and 270 kg·hm-2 ,respectively .
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