Greenhouse hydroponic culture technology itself is an important part of horticultural facilities and agricultural industrialization. Nowadays, the focus of research on facility horticulture is mostly how to improve the facility, standardization and intelligence level of hydroponic culture.

In fact, if the soil continues to be cultivated in the facility environment for more than three years, it means that soil continuous cropping obstacles or salinization will inevitably occur.

At the same time, the situation of crop diseases and insect pests is also showing an increasing trend. Therefore, the application prospect of hydroponic culture is very broad. Moreover, in the process of hydroponic culture, it is usually through the use of artificially prepared culture medium to fully meet the needs of mineral nutrients for plants.

Moreover, the proportion and formula of this nutrient solution and the regulation of its pH are the key to hydroponic culture, and it can also be recycled. Generally speaking, plants selectively absorb the ions contained in the prepared culture medium.

Once the concentration of some ions decreases rapidly, it will lead to the change of the proportion and pH value of various elements, which is slowly not suitable for the needs of plants. Therefore, the elements with insufficient concentration should be supplemented at regular intervals and the pH value of the culture medium should be adjusted appropriately.

The so-called "hydroponics" essentially refers to the direct contact between the roots of vegetables to be planted and the nutrient soup, so as to absorb the nutrients required for their own development. At present, the hydroponic culture modes which are widely used in real life mainly include deep-water hydroponic culture, pipeline hydroponic culture and so on.

At present, the greenhouse hydroponic culture mode is also faced with the phenomenon that the disinfection and sterility is not strict due to the non-standard design, so that the nutrient solution is often polluted or decayed due to hypoxia, resulting in bacterial breeding and so on.