保护地蔬菜系指温室、塑料大棚、中棚、小棚、地膜覆盖条件下的农田所种植的蔬菜。与露地蔬菜不同，给保护地蔬菜施肥要特别注意以下四点：　　1.适当控制施肥量。在相对较高的施肥条件下，露地栽培的蔬菜生长正常，而保护地栽培的蔬菜却常因土壤溶液浓度过高造成吸收水分和养? Protected vegetable means greenhouses, plastic sheds, sheds, sheds, mulch under the conditions of farmland grown vegetables. Different from open-field vegetables, special attention should be paid to the following four points: 1. Proper control of fertilizer application. In relatively high fertilization conditions, the open-field vegetables grow normally, while the protective cultivation of vegetables are often due to the high concentration of soil solution to absorb water and raise?