永州植烟土壤中量元素分布特征与聚类分析

Distribution Characteristics and Cluster Analysis of Medium Elements Contents in Tobacco-growing Soil in Yongzhou

为探明永州烟区土壤中量元素分布特征,2015年对永州市79个种烟乡镇689个植烟土壤的钙、镁、硫元素有效养分进行了取样调查和统计分析。结果表明,烟区土壤有效硫、交换性钙含量丰富,极少缺乏;土壤交换性镁缺乏比例占72.4%,应重视镁肥施用。利用聚类分析方法将永州烟区植烟土壤中量元素含量划分为4大特征区域,应根据养分分布特征,合理施用中量元素肥料。

In order to explore the medium elements distribution characteristics in Yongzhou tobacco area,the soil available nutrient of moderate element Ca,Mg and S in 689 tobacco-growing soils sample were investigated and analyzed,which collected from 79 tobacco-growing townships in Yongzhou Area,Hunan in 2015.The results showed that the soil available sulfur and exchangeable calcium were rich and rarely lacking,and the lack of exchangeable magnesium in soil accounted for 72.4%,so more attention should be paid to the application of magnesium fertilizer.The cluster analysis suggested that Yongzhou tobacco area was divided into four characteristic areas according to the content of moderate elements in soil.Moderate element fertilizer should be applied reasonably according to the characteristics of nutrient distribution.