This way of planting is so traditional that uses a tray as the growing containers (wood, foam, plastic, or bamboo etc.)
Here are the steps:
We drill holes at the lid of the container (made of above mentioned) in order to place the plant or growing cup of plant inside. We cover the base of plant with sponge. We place the lid of the container far from the water surface about 1 cm in order to let oxygen enter the water surface. This technique is used openly having both shallow and deep water. We have two ways in this technique.Deep water technique: the level of water is around18-20 cm.Shallow water technique: the level of water is around 5-10 cm.
We provide aeration with aerator or blower. It provides in the form of dissolved oxygen in the solution. This action looks like aeration in the fish tank. For this technique, there is no water or solution circulation. The deep water has to have more oxygen than the shallow one. When the temperature of the water is rising suddenly, the deep water system can speed down longer than the shallow one.
Another technique behind Hydroponics
Both Non-circulating and circulating systems are very similar in the way and structure but the difference is that the aeration to the water of solution is done by water or nutrient solution circulation. The technique is a closed system. The water or solution circulation was worked by water overflow the control level. The flowing amount of water is much or less up to the height of the control level and also the speed of water supplied. Both deep and shallow water techniques are useful. For deep water, it is easier in case of water shortage. When the flow rate of water is slow, it is easier to be oxygen deficiency than the fast. With the deep water technique, when the flow rate of water is slow, it seems to lack oxygen easier than the shallow one and the faster flow rate. When there is no enough oxygen, we can solve this problem by lifting the waterfall level higher from the supplying tube or tank, or increasing the flow rate of water. If the water flows too fast, it may harmful to the plants. So we fix air suction tube to this problem. Water or solution circulation is established in many forms such as Soak and Drain, Semi-Deep Nutrient Flow Technique, M-System, or Hyponika technique. The Hyponika technique was developed by Kiewwa Co., Ltd. from Japan and it was brought to demonstrate at ‘Science World Fair Expo 85’ at Tsukuba Tokyo.
If you are looking for the best method in planting according to Hydroponics, you can check and see more step by step in my blog. Beneficially, you can save time and space , and you don’t need to spend more time in preparing the nursery.
One more technique behind Hydroponics
NFT (Nutrient Flow technique) is the most popular technique consisting of water or solution circulation. The steps for this technique are followings:
Plant’s root is soaked in the gully which the slope of 1-3%. There is water or nutrient solution flowing as thin layer periodically as determined in order to let the plant’s root humid and has sufficient oxygen. This technique was developed by Allen Cooper, the British scientist in 1976.
As the conventional technique, the grower uses the flat gully with 30 cm in width, and 5 cm in height for growing the plants which have big stems such as tomato. Tomato has much root, so it obstructs the water flowing. After that, the supporting mat was developed in order to let the root developing inside it. Including, the growing box was developed also. It was placed on the supporting mat and the root was wrapped with heat reflected plastic in order to protect the heat from the strong sun light. As a bonus, the water or solution is helped with water dropping system.
Many forms of gullies have been developed such as the PVC circular tube and the titanium tube with 608 cm in diameter were brought to be gully. This kind of gully was drilled as the distance we required in order to let the small growing cup to place inside. The grower places the tube with the slope as 1% in order to let the thick layer of solution flow, about 1/2 -1/3 of tube diameter, flowing and stopping for a period of time as required. The grower switches providing water or solutions in the sequence of wetting and drying condition periodically. In the drying stage, plant takes the maximum oxygen. The tube with 15-18 meters in length is used in order to let the plant take oxygen sufficiently. This kind of technique is suitable for small and short life plant such as lettuce, mitsuba, spinach.
Fortunately, you can see every kind of plants and vegetables on the shelves of our markets, at home and wherever we stay. Honestly, we no longer worry about lack of vegetables.