湖南烤烟总糖、还原糖含量与几种土壤养分的关系分析

研究了湖南烤烟177份烟叶样品糖含量与土壤养分的关系。结果表明:(1)烟叶糖含量在样品间存在着广泛的变异,B2F、C3F和X2F等级的总糖含量分别为22.28±3.32%、24.84±2.91%和24.18±3.49%,还原糖含量分别为19.69±2.47%、22.10±2.55%和21.33±3.08%;(2)不同等级烟叶中糖含量与土壤全氮和碱解氮含量呈负相关,而与土壤全钾和速效钾含量呈正相关,但不同等级烟叶中影响糖含量的主导因子不尽一致;(3)对土壤中全氮、全钾、碱解氮和速效钾含量进行分组,研究了烟叶总糖和还原糖含量在不同组间的变化,表明烟叶糖含量一般随土壤钾素含量增加而增加,随土壤氮素含量增加而降低。

Relationship between Sugar Contents in Flue-cured Tobacco Leaves and Soil Nutrients in Tobacco-growing Areas in Hunan

Relationship was analyzed between sugar contents of flue-cured tobacco leaves and soil nutrients based on 177 samples from Hunan. The results showed that sugar contents among different samples changed significantly. The contents of total sugars in grades of B2F,C3F and X2F were 22.28±3.32%,24.84±2.91% and 24.18±3.49%,and the reducing sugars were 19.69±2.47%,22.10±2.55% and 21.33±3.08%,respectively. The correlation of sugar contents for different tobacco grades with total N and hydrolytic N in soil was negative,and with total K and available K was positive. But the factors of influencing sugar contents were different in different tobacco grades. Iinculuding total N,total K,hydrolytic N and available K,and the change was analyzed for contents of sugar in tobacco leaves,indicating that contents of sugar increased with soil K increasing and soil N decreasing.