辽宁植烟土壤pH值状况及其与烟叶主要品质指标的相关分析

Soil pH in Liaoning Tobacco Planting Area and Its Impact Tobacco Quality

以辽宁省7个植烟县为对象,采集了154个土壤和中部烟叶样品,在测定土壤pH值的基础上,测定烟叶中的烟碱含量、还原糖含量、总糖含量以及氮钾含量。通过数理统计的方法分析了土壤pH值与烟叶内在质量指标之间的关系,结果表明:辽宁烟区植烟土壤的pH值大多比较适合烟叶生长,但是仍有12%的植烟土壤pH值过高或过低,需要进行改良。土壤pH值与烟叶总氮含量、烟碱含量、钾含量两两之间均呈显著或极显著的曲线相关关系,即当土壤pH值从4.0变化到6.5时土壤pH值与烟碱含量之间为负效应关系,当土壤pH值从6.5变化到9.0时土壤pH值与烟碱含量之间为正效应关系,土壤pH值与总氮含量、钾含量、总糖含量之间为负效应关系。

154 samples of soil and middle tobacco leaf collected in seven tobacco planting counties in Liaoning Province were examined in this experiment.Soil pH value,the contents of nicotine,reducing sugar,total sugar,potassium and total nitrogen in tobacco leaves were measured.The relationship between the soil pH value and the intrinsic quality of tobacco leaves were analysed through the method of mathematical statistics.The results showed that the soil pH value was mostly suitable for tobacco growing,about 12%of pH value high or low.Soil pH value had significant correlations with the contents of total nitrogen, nicotine,potassium in tobacco leaves.When the soil pH value changed from 4.0 to 6.5,the soil pH value and nicotine content had a negative relationship;on the contrary when the soil pH value changed from 6.5 to 9.0,they had a positive relationship. The relationships between soil pH value and total nitrogen,potassium and total sugar were negetive.