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无土栽培的营养液配方很多,依植物种类、生长季节和栽培地区而不同。营养液中的主要营养成份和数量一般是:氮100～250ppm、磷50～100ppm、钾150～400ppm、钙200～300ppm 和镁50～70ppm。各种植物对营养元素的要求是有区别的:如菠菜、白菜、莴苣等叶菜类,要增加氮的供应;瓜果、块茎和块根类,如黄瓜、南瓜和马铃薯等要增加磷的供应。在气温高阳光充足的地区,要减少钾的供应。此外,还要根据水质情况作某些变更。如水中钙、镁离子含量高,则要减少钙、镁的供应。配制溶液可使用井水、河水、泉水和自来水,肥料可使用一般农用化肥和工业粗制化学药品,以降低成本。但在使用前要对它们的成份和纯度有所了解,以便计算出适宜的用量。
Soilless culture solution of many nutrients, depending on plant species, growing season and cultivation area and different. Nutritional fluids in the main nutrients and quantities are: nitrogen 100 ~ 250ppm, phosphorus 50 ~ 100ppm, potassium 150 ~ 400ppm, calcium 200 ~ 300ppm and magnesium 50 ~ 70ppm. Various plants have different requirements for nutrients: leafy vegetables such as spinach, cabbage and lettuce increase the supply of nitrogen; and fruits, tubers and tuberous roots such as cucumber, pumpkin and potato increase the supply of phosphorus . In areas with high sunshine, reduce the supply of potassium. In addition, some changes should be made according to the water quality. Such as water, calcium, magnesium ion content is high, we must reduce the supply of calcium and magnesium. The solution can be used to make well water, river water, spring water and tap water. The fertilizer can use general agrochemicals and industrial crude chemicals to reduce costs. However, before use to understand their composition and purity, in order to calculate the appropriate amount.