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本文利用植物化学分析、评吸和数学统计分析对利川烤烟营养状况进行了评价。结果表明：在利川目前生产条件下，烟叶总氮含量偏低，磷含量过高，利川烤烟大部分烟样不缺镁，２１％的烟样铜含量低于１０×１０－６，部分烟样硼不足。烟叶还原糖含量较适宜，但烟碱含量太低，导致氮碱比和糖碱比严重失调，其主要原因与氮和铜含量过低，磷和铁含量过高有关。评吸总分与烟碱含量呈极显著正相关，与氮和钾呈正相关，与磷含量呈负相关。评吸总分还与铜、镁、硫和锰含量呈正相关，与铁、硼和锌呈负相关，其中与铁含量呈极显著负相关。通径分析结果表明：营养元素对香吃味影响的相对大小分别为磷＞铁＞氮＞硼＞钙＞锌＞钾＞铜＞镁＞锰＞硫，其中氮、钙、锌、钾、铜和锰对香吃味的影响为正效应，磷、铁、硼、镁和硫为负效应。建议利川适当增施氮和铜，减少磷的施用，稍许增加或保持钾的用量不变，采取措施（例如适量施用石灰等）降低烤烟对铁的吸收。
In this paper, phytochemical analysis, suction and mathematical statistics analysis of the nutritional status of flue-cured tobacco in Icheon were evaluated. The results showed that under the current production conditions of Lichuan, the content of total nitrogen and phosphorus in tobacco leaves were too low, most of the tobacco samples of Lichuan were not deficient in magnesium, and the copper content in 21% of the samples was less than 10 × 10-6. B deficiency. Reducing sugar content of tobacco is more appropriate, but the content of nicotine is too low, resulting in a serious imbalance of nitrogen-to-alkali ratio and sugar-to-alkalis ratio. The main reason is related to the low content of nitrogen and copper and the excessive content of phosphorus and iron. Total score of smoking was significantly and positively correlated with nicotine content, positively correlated with nitrogen and potassium, but negatively with phosphorus content. The total score of smoking was also positively correlated with the contents of copper, magnesium, sulfur and manganese, negatively correlated with iron, boron and zinc, with extremely significant negative correlation with iron content. The results of path analysis showed that the relative sizes of nutrients to fragrant and edible taste were phosphorus> iron> nitrogen> boron> calcium> zinc> potassium> copper> magnesium> manganese> sulfur, of which nitrogen, calcium, zinc, potassium and copper And manganese on the aroma and flavor of the positive effect, phosphorus, iron, boron, magnesium and sulfur as a negative effect. It is recommended that Ichikawa appropriately increase nitrogen and copper, reduce the application of phosphorus, slightly increase or maintain the same amount of potassium, and take measures to reduce the absorption of iron by flue-cured tobacco.