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82.何谓营养液? 无土栽培是在不具备适宜土壤的条件下,进行作物栽培的,所以,它的最大特征是用人工的方法将作物需要的各种矿物质营养元素溶解于水中,配制成肥水溶液的形态来供给作物所需要的肥水条件,这种供作物所需要的肥水溶液称为营养液。也就是说作物生育的全过程所需要的肥水条件,全部是由营养液供给的,因此,营养液及其配制管理技术,是无土栽培的中心问题,也是关系到无土栽培成败的决定因素。 83.怎样选用营养液的肥料? 作物在生育过程中,需要通过根系吸收多种矿物质营养元素来维持其自身的生命活动,如构成作物的
82. What is a nutrient solution? Soilless cultivation is carried out without appropriate soil conditions, so its greatest characteristic is the artificial method of the crops required for the various mineral nutrients dissolved in water, the preparation of Fertilizer into the form of aqueous solution to provide fertilizers required for crop conditions, this fertilizer for fertilizer called fertilizer solution. That is to say, the fertilizers and water conditions required for the whole process of crop growth are all supplied by the nutrient solution. Therefore, the nutrient solution and its formulation and management techniques are the central issue of soilless culture and are also the determinants of the success or failure of soilless cultivation . 83. How to choose nutrient solution fertilizer? Crops in the reproductive process, the need to absorb a variety of mineral nutrients through the root system to maintain its own life activities, such as the composition of the crop