我国北方水质与无土栽培系统的选择

Soiless Cluture Systemes Selection in Relationship with Water Quality in North China

经过分析我国北方各地的水质，指出了北方地区配制营养液用水中的超标元素及其浓度，并比较了营养液、基质和土壤对ＰＨ变化的缓冲能力的大小。在此基础上，探讨了在北方硬水地区配制营养液应采取的措施及适宜的无土栽培系统。

s:After analysing different locations water quality of northeast, north, and northwest China, the most areas water EC and pH value are higher than standard. If to use these water for making nutrient solution need to add a lot acid, and some elements are still more than enough. It needs to select suitable system for crop production. The substrate system has more buffer effects and low costs.