Floating Deep Water Culture Hydroponic Lettuce System
Dry Hydroponics is a company based in Holland that is involved in the development and advancement of hydroponic technology. Here they demonstrate a modification to the “deep flow culture” method that is able to increase the crop production by 20% greater than other methods they have tested.
Water culture is the simplest hydroponics system in that it doesn’t require continual flow of nutrients or periodic pumping in and out of liquid. This means it is not susceptible to power outages.
Deep water culture also allows for growing crops on a huge scale. This is done using long channels called “raceways”, which are typically 4 metres wide, some 30 centimetres deep, and up to 70 metres (!) in length. At its prime production, as one crop is harvested at one end, another is planted at the other end.
The down side to water culture hydroponics is its restriction to use with plants that don’t mind having their roots continually submersed in water. Lettuce is a plant that thrives in this type of hydroponics system, and from the video it is obvious that this is the case.
Each lettuce seed is initially germinated in a cube of peat moss. Once the root system has developed sufficiently, the plant is transplanted together with its peat moss cube into the hydroponics system. The roots on these lettuce plants are a bright white colour, which is a very healthy sign.
I would be interested in seeing some direct comparisons between hydroponic systems, or when different components are used in hydroponic systems. For example, what effect does peat moss have on the success, rate of growth, and amount of produce that is formed by plants? How does it compare to other growing media? Can it be improved in any way by combining with other media?
Filed under: Grow Hydroponically
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