我们于1979年在本市郊区潘家村公社种子站进行了蔬菜无土栽培试验。方法是采用水培、砂培、煤灰培等,以土培为对照。供试蔬菜为番茄、黄瓜、花椰菜和辣椒等。自拟营养液配方A、B_1、B_2三种,以印度Ⅰ、Ⅲ号配方为对照(见表)。大量元素和微量元素分别从一般化学肥料和化学试剂获得。用浅层地下水稀释。pH值为6.5。 We conducted a soilless culture experiment of vegetables in the seed station of Panjiacun Commune in the suburb of our city in 1979. Method is to use hydroponics, sand culture, coal ash training, soil culture as a control. The test vegetables for tomatoes, cucumbers, broccoli and pepper. Self-formulated nutrient solution A, B_1, B_2 three kinds of India Ⅰ, Ⅲ formula as a control (see table). A large number of elements and trace elements were obtained from the general chemical fertilizers and chemical reagents. Dilute with shallow groundwater. pH 6.5.