Birmingham now has 58 hydroponics shops , up from 42 just a year ago .

伯明翰现在有58家水栽培商店，而一年前只有42家。

Although this is urban hydroponics , not vertical farming , it is a step in the right direction , says mr head .

海德表示，虽然这只是城市水培温室农场，算不上垂直农场的实现，但这仍是往正确目标走出的一步。

Most important , hydroponics allows the grower to select where to locate the business , without concern for outdoor environmental conditions such as soil , precipitation or temperature profiles .

最重要的是，种植者可以自由选择水培生产场所而不需要考虑室外环境条件，诸如土壤、降水或温度等。

There are a number of ways to do it , but essentially hydroponics involves suspending plants in a medium-such as gravel , wool or a form of volcanic glass known as perlite-while the roots are immersed in a solution of nutrient-rich water .

水培法有多种方式，不过最基本的水培技术是将作物栽于在某种基质之上比如砾石、羊毛或被称为珍珠岩的火山玻璃作物根部则浸没于营养液里。