Episode 7: Part 6: Ebb & Flow / Flood & Drain Hydroponic system क्या होता है एब एंड फ्लो सिस्टम ? скачать в хорошем качестве

Episode 7: Part 6: Ebb & Flow / Flood & Drain Hydroponic system क्या होता है एब एंड फ्लो सिस्टम ?

Ebb and Flow (flood and drain) are two phases of the tide or any similar movement of water. The Ebb is the outgoing phase when the tide drains away from the shore, and the flow is the incoming phase when the water rises again. In Hydroponics Ebb and Flow is a form of hydroponics that is known for its simplicity, reliability of operation and low initial investment cost. Pots are filled with an inert medium which does not function like soil or contribute nutrition to the plants but which anchors the roots and functions as a temporary reserve of water and solvent mineral nutrients. The hydroponic solution alternately floods the system and is allowed to ebb away. Under this system, a water-tight growing bed (table), pots that are placed in the table will hold the medium. The medium can consist of material that the root system can reach the level ebb reaches. A medium can consist of lava rock, Rockwool cubes, and fibre. A mixture of these different types of the medium can absorb the moister more evenly and efficiently. this is periodically flooded for a short period (5 to 10 minutes) with a nutrient solution pumped from a supply tank. By placing the nutrient solution supply tank below the growing bed, the nutrient solution can drain back by gravity. This hydroponic growing system can be very effective for any size plants depending on space. The method is inefficient in its use of water and plant nutrient reagents. Root disease occurrence and nutrient element insufficiency can occur without repeated use of the solution without proper oxygenation on the tables that are flooded. Because it is a "closed” system, the re-circulated nutrient solution will require monitoring every time the system flows back the reservoir for pH and PPM. Within the growing period, the nutrient solution may require replacement. The rooting medium will require washing to remove root debris and accumulated precipitates as well as sterilization before reuse