郭山虎 张锦涛 何志明 唐应勇 田山 贾丽华 易克 李强

摘 要：为了解马龙植烟区土壤pH值和中微量元素的分布特征以及二者之间的相关关系，在马龙植烟区采集214个土壤样品，分别测定土壤样品的pH值和土壤养分含量，采用传统统计学方法对样本进行分析。结果表明：马龙植烟土壤有效钙、有效镁、有效锌、有效硫和有效钼含量的平均值均偏高，只有有效硼含量的平均值处于适宜烤烟生长的范围;土壤pH平均值偏低，为5.43，pH值处于适宜烤烟生长范围（5.51～7.00）的样本数占35.98%;不同乡（镇）间植烟土壤的中微量元素差异显著，而土壤pH值差异不显著;马龙植烟区土壤pH值与有效钙、有效镁呈极显著正相关，与有效硼、有效硫呈极显著负相关，与有效锌呈显著正相关，而与有效钼无明显相关关系;植烟土壤有效钙、有效镁、有效锌含量随土壤pH值的增大呈上升趋势，有效硼、有效硫随土壤pH值升高而呈降低的趋势。

关键词：植烟土壤;pH值;中微量元素;相关分析;马龙植烟区

中图分类号：S153; S572文献标识码：A文章编号：1006-060X（2020）10-0058-04

Abstract： In order to understand the distribution characteristics of medium-trace elements and pH value in Malong tobacco growing area and their correlation， 214 soil samples were collected in Malong tobacco growing area， and the pH value and nutrient contents of soil samples were measured， and analyzed by traditional statistical methods. The results showed that the average contents of available calcium， available magnesium， available zinc， available sulfur and available molybdenum in Malong tobacco growing soil tended to be high， only the average content of available boron was in the suitable range for the growth of flue-cured tobacco; the average pH value of soil was 5.43， and 35.98% of the samples were in the suitable range （5.51-7.00）; there were significant differences in the contents of soil medium and trace elements among different townships， but there was no significant difference in soil pH; in Malong tobacco area， soil pH was extremely significantly positively correlated with available calcium and magnesium， extremely negatively correlated with available boron and sulfur， significantly positively correlated with available zinc， but had no significant correlation with available molybdenum; the contents of available calcium， magnesium and zinc in tobacco soil increased with the increase of soil pH， while the contents of available boron and sulfur decreased with the increase of soil pH.

Key words： tobacco soil; pH value; medium-trace elements; correlation analysis; Malong tobacco growing area

土壤条件是影响烟叶产量和质量的首要因素。土壤pH值与烤烟的生长以及烟叶的外观质量、内在化学成分和评吸质量有关[1-3]。土壤中微量元素是土壤肥力的基础，其与优质烟叶的生产有密切关系[4-7]。土壤pH值不仅影响土壤微生物群落，而且通过影响土壤养分、形态和有效性来影响烤烟的产量和质量[8]，因此土壤pH值与土壤养分的关系是研究的热点。邓小华等[8]和段淑辉等[9]研……