烟稻复种连作对土壤理化性状影响效应研究

采取土壤定位检测和回归分析方法进行烟稻复种连作对土壤理化性状的影响效应研究袁结果表明：在0~23 年烟稻复 种连作研究范围内，随复种连作年限的增加，土壤pH 值显著升高，且均在7.5 以上；土壤物理性状逐步变劣，土壤有机质、氮磷养分、土壤微生物的变化较复杂，基本在复种连作14~18 年后呈下降趋势，土壤理化性状的变化趋势总体不利于烤烟生长。

Study on effect of continuous and multiple cropping of tobacco-rice on soil physical and chemical properties

Location detection in tobacco field and the method of regression analysis were took to research the effect of continuous and multiple cropping of tobacco-rice on soil physical and chemical properties.The results showed that during 0~23 years of continuous and multiple tobacco-rice cropping,soil pH value increased significantly and was in the above 7.5 level.With increasing of continuous and multiple cropping years.Soil physical properties was gradual deterioration.The change of organic matter,nitrogen and phosphorus nutrients,microorganism of soil was complex,it showed a downward trend after 14~18 years of continuous and multiple cropping.The change trend of soil physical and chemical properties was not conducive to the growth of flue-cured tobacco.