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利用贵州乌蒙烟区31个地点的土壤及烟叶样品数据,对清甜香烤烟风格形成的土壤腐殖质组成特征进行了分析。结果表明:乌蒙烟区土壤腐殖质碳量均值为12.24 g kg-1,胡敏素碳量、胡敏酸碳量、富里酸碳量均值分别为8.49、0.74和3.02 g kg-1。腐殖质组分相对含量中胡敏素比例最高,腐植酸比例平均为31.83%。腐殖质各组分变异系数均较大。形成不同清甜香风格的土壤腐殖质各组分碳量均表现为弱清甜香显著高于典型清甜香和清甜香。腐植酸比例以弱清甜香风格最低;典型清甜香风格形成的胡敏酸比例显著高于清甜香和弱清甜香;胡敏素比例以弱清甜香风格最高。弱清甜香风格形成的土壤腐殖质水平总体较高,其土壤腐殖质碳量均值为16.31 g kg-1,弱清甜香烤烟生长的土壤样本50%的腐殖质碳量大于15 g kg-1。
Based on the data of soil and tobacco leaf samples collected from 31 sites in Wumeng, Guizhou Province, the composition characteristics of soil humus formed by sweet-scented tobacco were analyzed. The results showed that the average soil humus content of Wumeng tobacco was 12.24 g kg-1, and the mean values of humic acid, humic acid and fulvic acid were 8.49,0.74 and 3.02 g kg-1, respectively. Humic components in the relative content of the highest proportion of humin, humic acid average ratio of 31.83%. The coefficient of variation of each component of humus is larger. The amount of carbon in each component of soil humus which formed different sweet-scented osmanthus style showed weak-smelling sweetness significantly higher than that of typical sweet-smelling and sweet-smelling sweetness. The proportion of humic acid is the lowest in the style of weak sweetness. The percentage of humic acid formed by typical sweetness style is significantly higher than that of sweetness and weakness. Humrin proportion is the highest with weak sweetness. The soil humus formed by the weak sweet-smelling style had a high level of soil humus, with an average of 16.31 g kg-1 soil humus, and 50% humus carbon content in soil samples grown with weak sweet-scented tobacco was more than 15 g kg-1.