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保护地蔬菜土壤养分状况与大田露地土壤有很大差别.土壤有机质含量高于露地,一般在15~40g/kg,土壤有酸化的趋势.土壤中有效氮的含量明显高于露地土壤,硝态氮的平均含量超过190mg/kg.土壤有效磷的含量158.8mg/kg,比露地土壤高出6倍多.土壤有效钾的平均含量274.52mg/kg,比露地土壤高出2.56倍.土壤中交换性钙和镁的含量在临界指标以上,但某些情况下作物出现缺钙和缺镁症.化肥施用量大,决定了保护地蔬菜土壤养分的特点.
Protected vegetable soil nutrient status and open field soils are very different. Soil organic matter content is higher than the open field, generally 15 ~ 40g / kg, soil acidification trend. The content of available nitrogen in soil was significantly higher than that in exposed soil, and the average content of nitrate nitrogen was over 190mg / kg. Soil available phosphorus content of 158.8mg / kg, more than 6 times higher than the open field soil. The average content of soil available potassium 274.52mg / kg, 2.56 times higher than the open field soil. The levels of exchangeable calcium and magnesium in soils are above the critical target but in some cases calcium deficiency and magnesium deficiency occur in the crop. Large amount of chemical fertilizer to determine the characteristics of the protective vegetable soil nutrients.