目前,有些国家和许多大城市已用无土栽培生产出相当数量的蔬菜。发展蔬菜无土栽培需要解决多种技术问题,而配制营养液是要解决的主要技术关键,因为无土栽培的作物只有通过吸收营养才能获得它生命活动所必需的大量和微量元素。为此,上 At present, some countries and many big cities have produced a considerable amount of vegetables using soilless cultivation. The development of soilless culture of vegetables requires the solution of a wide range of technical problems, and the formulation of nutrient solutions is the key technical issue to be solved because, in soils, soilless cultivation can only obtain large quantities and trace elements necessary for its life through the absorption of nutrients. For this, on