The floating platform system ? deep water culture (DWC, Deep Water Cultivation) is a classic laboratory system. It completes the classification of existing systems. Many greenhouses use floating platforms or raft method. The system consists of large concrete pools filled with nutrient solution, in which lettuce seedlings float on foam rafts. On the one hand, they harvest the crop on rafts daily, the other rafts shift in their place, freeing it for new ones, with young seedlings. The lettuce is harvested once every 30?35 days, so the rafts of the rows are made 30?35. With such a system, space is used very efficiently. The solution is used throughout the season, the necessary salts and water are added to adjust the balance.
We are also interested in a compact laboratory version. Imagine a container of any shape and size, usually a bucket of 5-10 liters. An air curtain or air sprayer connected to a small air pump for actuation should be placed on the bottom of the bucket. Then the nutrient solution is poured into the bucket and a sheet of foam is placed on the water surface. The foam has a round hole for the mesh pot.
What could be easier and cheaper! This system is most often used in scientific crop laboratories for experiments. The most advanced laboratories use the most ancient hydroponic technology for growing plants. This undoubtedly has its own beauty.
In the shops of the plant today, you can find a version of this device. The same idea of a container with air bubbles inside, but the lid is rigid and attached to the container, rather than floating.
This simple system is not only easy to install, but it is also effective. Oddly enough, bubbling bubbles in the water are not the best way to oxygenate. However, a large number of bubbles, constantly delivered by the pump, provides good aeration of the solution and enough oxygen, even for a large plant.
This system is not particularly reproached for anything, except that plants are very vulnerable to pump failures or power cuts. If the flow of air bubbles stops, oxygen will quickly dry out. Crop survival depends on environmental conditions. At best, he will not live for more than 24-30 hours. The risk is low since air pumps are usually reliable. However, it is better to have on hand another one in reserve, just in case.
Obviously, this may not be the only hydroponic system on the farm, but it is quite widely used in room plants, and it may not be a hindrance to building one such. It can be used to grow a single plant, if you want to experiment with a new species, be it for a picture of growth, growth rate or quality of the final product, before planting the plant in the whole greenhouse.
Free Expert Advice for Growing Vegetables and Fruits Hydroponically - Questions and Answers