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分析了山东烟区的降水分布规律,并对该区初烤烟叶C3F样品的化学成分与5、6、7、8月和5-8月降水进行了相关和逐步回归分析。结果表明,(1)降水与烟叶化学成分的相关和逐步回归分析结果基本一致;(2)还原糖、总糖、总植物碱、蛋白质、K2O、Cl、糖碱比、施木克值、挥发性碱、铁、锰、磷与降水的回归方程达极显著水平,总氮、铜、钙、镁与降水的回归方程达显著水平,锌、硼与降水量在0.05显著水平下没有得到逐步回归方程;(3)还原糖、总糖、K2O、糖碱比、施木克值与5月和8月降水量呈正相关;蛋白质、挥发性碱、磷与5月和8月降水量呈负相关;总氮与5月降水量呈负相关;总植物碱受5-8月总降水量影响较大,呈负相关;Cl与5月、6月和5-8月总降水量呈负相关。
The distribution of precipitation in Shandong tobacco area was analyzed. Correlation and stepwise regression analysis were performed between the chemical composition of C3F samples in early flue-cured tobacco leaves and the precipitation in May, June, July, August and May-August. The results showed that: (1) Correlation and stepwise regression analysis of precipitation and tobacco chemical components were basically the same; (2) Reducing sugar, total sugar, total alkaloid, protein, K2O, Cl, The regression equations of alkaloids, iron, manganese, phosphorus and precipitation reached extremely significant levels, and the regression equations of total nitrogen, copper, calcium, magnesium and precipitation reached a significant level. The regression of zinc, boron and precipitation was not significant at the 0.05 level (3) The contents of reducing sugar, total sugar, K2O, ratio of sugar and alkali to wood, and the value of Shiqike were positively correlated with the precipitation in May and August. The contents of protein, volatile alkali and phosphorus were negatively correlated with precipitation in May and August Total nitrogen was negatively correlated with precipitation in May. Total alkaloids were negatively correlated with total precipitation in May-August, and negatively correlated with total precipitation in May, June and May-August.