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１连作蔬菜地土壤障害类型１．１土壤酸害连作蔬菜地由于长期施过磷酸钙、氯化钾等酸性和生理酸性肥料 ;过量施用氮肥 ,使硝态氮大量累积 ;有机肥用量减少 ,土壤缓冲性差等因素 ,致使土壤酸化严重。由于土壤酸害严重 ,植株易发生死苗、缺株、生长点坏死现象。１．２盐分聚积毒
1 continuous cropping soil type of soil disorders 1.1 soil acid damage continuous cropping due to the long-term application of calcium phosphate, potassium chloride and other acidic and physiological acid fertilizers; excess nitrogen fertilizer, a large number of nitrate nitrogen accumulation; organic fertilizer consumption decreased soil Poor cushioning and other factors, resulting in serious soil acidification. Due to severe soil acid damage, plants prone to dead seedlings, lack of growth, growth and necrosis phenomenon. 1.2 salt accumulation of poison