不同有机物料施用年限对设施菜地土壤养分和重金属含量的影响

Effect of Different Organic Materials Application Years on Soil Nutrient and Heavy Metal Content of Vegetable Soil

为探究不同农业有机肥料施用对设施菜地土壤质量的影响,本文以浙江省嘉兴地区某设施蔬菜生产基地为调查对象,分析了不同有机物料施用年限对设施菜地土壤全N、速效P和速效K、pH、电导率和土壤中重金属含量。结果表明:长期施用有机物料有利于改善设施菜地土壤酸碱度和减控土壤盐渍化发生程度。然而,长期施用有机物料增加了设施菜地土壤重金属含量超标的风险,特别是砷(As)和镉(Cd)。因此,应加强对设施菜地有机物料施用和种植模式的管理,减少因土壤重金属超标而造成的健康风险。

In order to know the effect of different organic materials application on the soil quality of the protected vegeta‐ble soil ,a field plot experiment was conducted in Jiaxing suburb .The contents of total N ,rapidly available P ,K and the heavy metals contents were determined .The results showed that long‐term application of organic manure could sig‐nificantly adjust the pH of soil and reduce the soil salinization ,while which improved the risk of heavy metals accumula‐tion in soil ,especially As and Cd .Therefor ,we should strengthen management for applying the organic material on the protected vegetable soil ,and reduce the human health risk from the soil heavy metals beyond the standard .