曲靖市植烟土壤条件对烟叶还原糖含量的主要影响因素分析

The Analysis of the Main Factors that the Tobacco Soil Conditions Affect the Reducing Sugar in Qujing City

通过不同的统计方法对云南省曲靖市植烟土壤条件与中部叶还原糖含量进行分析,分析总结影响烟叶还原糖的主要影响因素。结果显示：（1）影响曲靖市中部叶还原糖含量主要因素是海拔高度,海拔高度的拐点为1850m、1867m、1945m、2158m,按照拐点分割的烟叶还原糖均值分别为23.38%、21.77%、23.33%、24.37%;（2）海拔在1850~1867m范围的烟叶还原糖含量较低（21.77%）,可能与土壤pH稍高有关;（3）水溶性氯是海拔≤1850m还原糖含量的主要影响因素,其拐点为4.84mg/kg,按拐点分割的还原糖含量分别为25.51%、23.15%;（4）有效钼是海拔1945~2158m范围烟叶还原糖主要影响因素,其拐点分别为0.15mg/kg、0.65mg/kg。按照拐点分割的还原糖含量均值分别为23.70%、25.02%、23.09%;（5）有效硫含量是有效钼0.15~0.65mg/kg范围烟叶还原糖主要影响因素,其拐点分别为19.18mg/kg、47.74mg/kg、105.76mg/kg,按照拐点分割烟叶还原糖含量均值分别为24.60%、25.29%、26.27%、22.25%。海拔、有效钼、有效硫、有效氯是影响烟叶还原糖的主要因素,可通过分类树模型预测烟叶还原糖含量。

To analyze the relationship between the content of the chemical composition of soil samples and the corresponding reducing sugar of the tobaccos ’ middle leaves collected from Qujing city, Yunnan Province, by different statistical analysis methods. The results showed that： （1） altitude was a major factor in affecting the reducing sugar in Qujing city, The turning points for the altitude were 1850 m, 1867 m, 1945 m, 2158 m, the means of the reducing sugar were 23.38% , 21.77% , 23.33% , 24.37% , accordance with the turning points; （2） in the altitude of 1850-1867 m, that the content of the reducing sugar was low may be related to slightly higher pH of the soil; （3） in the attitude of less than or equal 1850 m, the water-soluble chlorine was the main factor what affect the content of the reducing sugar, the turning point was 4.84 mg/kg, the means of that were 25.51%, 23.15%; （4） in the altitude of 1945-2158 m, the effective Mo was the main factor, the turning points were 0.15 mg/kg, 0.65 mg/kg, the contents of the reducing sugar were 23.70%, 25.02%, 23.09%; （5） when the effective Mo was in the range of 0.15-0.65 mg/kg, the effective sulfur was the main factor. The turning point were 19.18 mg/kg, 47.74 mg/kg, 105.76 mg/kg, the means of the reducing sugar were 24.60% , 25.29% , 26.27%, 22.25%. Elevation, effective molybdenum, effective sulfur, effective chlorine were the main factor.