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以东北填充型烤烟品种“龙江911”为试验材料,通过正交回归田间试验,建立了氮、磷、钾肥与烤烟上部叶片烟碱含量的回归效应模型,并对各因子和交互作用进行了分析,模拟计算得出以降低上部叶片烟碱含量为目标的优化施肥方案.对模型解析表明,随施氮量增加,上部叶片烟碱含量呈先上升后下降趋势;随施磷量增加,烟碱含量呈上升趋势;随施钾量增加,烟碱含量呈急剧下降趋势.双因素效应大小依次为:氮钾>磷钾>氮磷,在一定范围内,氮磷、磷钾与烟碱含量表现为负相关,存在拮抗作用;而氮钾则相反,存在促进作用.对氮、磷、钾肥与烤烟上部叶片烟碱含量模型的综合分析得出:在植烟土壤为河淤土的生产区,烟田的基础施肥量建议为:氮肥33.5～47.8kg·hm-2,磷肥40.2～63.6kg·hm-2,钾肥78.0～119.6kg·hm-2.
A regression model of nitrogen, phosphorus and potassium fertilizers and nicotine content in the upper leaves of flue-cured tobacco was established by orthogonal regression to field experiment with “Northeast” Flue-cured Tobacco Variety “Longjiang 911” as test material. The correlations among various factors and interactions The optimal fertilization scheme with the aim of reducing the nicotine content in the upper leaves was obtained through simulation analysis.The model analysis indicated that the nicotine content in the upper leaves increased first and then decreased with the increase of nitrogen application rate, , Nicotine content showed an upward trend.With the increase of potassium application, nicotine content showed a sharp downward trend.Double factor effect size followed by: nitrogen and potassium> phosphorus and potassium> nitrogen and phosphorus, within a certain range, nitrogen and phosphorus, phosphorus and potassium and smoke Alkali content showed negative correlation, antagonistic effect; while nitrogen and potassium, on the contrary, had a promoting effect on nitrogen, phosphorus and potassium fertilizer and tobacco leaf nicotine content of the comprehensive analysis of the model obtained: In the production area, the recommended basic fertilizer amount for tobacco fields is 33.5-47.8 kg · hm-2 for nitrogen fertilizer, 40.2-63.6 kg · hm-2 for phosphate fertilizer and 78.0-119.6 kg · hm-2 for potash fertilizer.