曲靖烟区烟叶微量元素与土壤pH值关系研究

为了探明云南曲靖植烟土壤pH值对烟叶微量元素含量的影响,在曲靖烟区采集土样和烟叶样各3656份,采用多元统计分析、相关性分析和平滑回归分析研究了曲靖烟区土壤pH值与烟叶微量元素含量的关系。结果表明,土壤平均pH值为6.28,pH值在5.5以下的土壤样本占22.62%,在7.0以上的占24.45%。曲靖烟叶铁和锌含量处于高水平,而硼、钼和氯含量处于低水平。锰含量适宜的烟叶样本比例最高,约有70%的样本处于适中水平。烟叶锰、锌和氯含量与土壤pH值呈极显著负相关关系,烟叶硼、钼和铁含量与其呈极显著正相关关系。曲靖烟区在烟叶生产中应注重结合丰缺的微量元素,科学合理增施硼和钼肥,增加烟叶微量元素,提高烟叶质量。

The Relationship between Trace Elements in Tobacco Leaves and Soil pH in Qujing

To explore the influence of soil pH on trace element content of tobacco leaves in Qujing, a total of 3656 soil samples and tobacco leaf samples were collected. The multivariate statistical analysis, correlation analysis, and smooth regression analysis were used to study the relationship between trace element content of tobacco leaves and pH value of soil in Qujing, Yunnan. The results showed that the mean value of soil pH was 6.28. The soil samples with a pH below 5.5 and above 7.0 accounted for 22.62% and 24.45%, respectively. The contents of iron and zinc in Qujing tobacco leaves was high. Boron, molybdenum, and chlorine were at low levels. The optimum proportion of manganese content in tobacco leaves was the highest, and about 70% of the leaf samples were at a moderate level. The contents of manganese, zinc, and chlorine in tobacco leaves were negatively correlated with the soil pH, while the contents of boron, molybdenum, and iron of tobacco leaves were positively correlated with the soil pH. In Qujing tobacco production area, we should pay attention to the abundance and lack of trace elements in tobacco leaves, scientifically and rationally increase boron and molybdenum fertilizers, increase trace elements in tobacco leaves and improve the quality of tobacco leaves.