不同烟草栽培地区土壤理化性质与AM真菌分布关系

此文主要研究丛枝菌根分布特点和土壤理化性质及其之间的关系。以山东省和云南省部分烟区为例，在大田栽培条件下分析烟区土壤理化性质，利用蔗糖密度梯度离心方法分离土壤中的丛枝菌根真菌孢子。烟草栽培地区的土壤中丛枝菌根孢子量较高，其土壤中的有机质、全氮、全磷、全钾以及碱解氮、速效磷和速效钾含量均呈下降趋势，且以速效养分的变化较为显著，但土壤pH与孢子含量之间则无明显的关系。各烟草栽培地区除pH没有显著差异外，土壤中残留的有机质和氮、磷、钾含量存在着较大差异；丛枝菌根孢子量较高的青岛地区烟草栽培土壤中残留的碱解氮、速效磷和速效钾含量较其他地区明显低，说明土壤中AM真菌能够明显促进烟草对土壤中速效养分的吸收和利用。

Relationships Between Physical and Chemical Properties of Different Tobacco Cultivation Soil and Distribution of AM fungi

The physical and chemical properties of different tobacco cultivation soils and distribution of the characteristics of arbuscular mycorrhizal fungi and their relationships were studied. In the field experiments were carried out and parts of tobacco areas in Shandong and Yunnan Province as an example, which by agricultural analysis to analyze the physical and chemical properties of tobacco cultivation soil and by sucrose density gradient centrifugation to separate arbuscular mycorrhizal fungi spores. The res...