植烟地土壤理化性质对烟草病害发生的影响

选择4种不同土壤环境的烟区进行炭疽病和赤星病的发生情况调查,分析了植烟地土壤的理化性质与烟区炭疽病和赤星病发生的相关性,结果表明:炭疽病和赤星病的发生与土壤中全磷、全钾、缓效钾、交换性钙、交换性镁、有效硫、有效锌、水溶性氯、水溶性盐等的含量以及土壤电导率和土壤中阳离子交换量均表现出一定的相关性。在烟草种植中,除氮、磷、钾的比例需要根据测土配方施肥外,中、微量元素的使用应引起重视。

Effects of Physicochemical Properties of Tobacco Planting Soil on Occurrence of Tobacco Diseases

Four tobacco planting areas with different soil environments were chosen to investigate occurrence situation of anthracnose and brown spot,in order to analyze the correlation between physicochemical properties of tobacco planting soil and occurrence of anthracnose and brown spot of tobacco.The results indicated that the occurrence of anthracnose and brown spot showed certain correlations with the contents of total phosphor,total potassium,slow potassium,exchangeable calcium,exchangeable magnesium,available sulfur,available zinc,water-soluble chlorine and water-soluble salt,the soil electric conductivity and the cation exchange capacity.Therefore,for tobacco planting not only need pay attention to the ratio of nitrogen,phosphor and potassium in soil,but also need pay attention to the application of trace element.