Outline the techniques and methods you would use to implement optimal growing conditions for a range of horticultural crops via hydroponics
Asked By Shailja
Replied by Admin
Hydroponics is the process of growing of plants in a soil less medium or an aquatic based environment. It uses mineral nutrient solutions to grow plants in water, without soil. The techniques and methods for optimal growing conditions for a range of horticultural crops via hydroponics : Hydroponics is to grow plants with their roots suspended directly into water with no growing medium. 1) Wicks System : The Wick system is the most simple hydroponic system which is described as a passive system means there are no moving parts. From the bottom reservoir, nutrient solution is drawn up through a number of wicks into the growing medium. It uses variety of mediums, perlite, soil or coco. 2) Water Culture : Water Culture is described as a active system means it is an active system with moving parts. In this method, the roots of the plant are totally immersed in the water which contains the specific nutrient solutions. Air pump is used to oxygenate the water and allow the roots to breathe. 3) Ebb and Flow System (Flood and Drain) : Ebb and Flow system works by temporarily flooding the grow tray. In this system, nutrient solution from a reservoir surrounds the roots before draining back which is usually automated with a water pump on a timer. 4) Drip System (recovery or non-recovery) : In dip systems, timer will control a water pump, which pumps water and nutrient solutions supplied through a network of elevated water jets. Recovery system will collect excess nutrient solution back into the reservoir and non-recovery drip system will avoid pH of the reservoir not to vary. If recovery system is used then be sure to check the pH level of the reservoir regularly. 5) NFT system : The N.F.T system ( nutrient Film Technique ) uses a constant flow of nutrient solution, so no timer is required. The solution is pumped from a reservoir into the growing tray which requires no growing medium. The roots draw up the nutrients from the flowing solution. The downward flow pours back into the reservoir which will be recycled again. Pump and electric maintenance required to avoid system failure as roots can dry out rapidly when the flow stops. 6) Aeroponic System : In aeroponic systems, the growing medium is primarily air. The roots hang in the air and are misted with nutrient solution which usually done every few minutes as roots will dry out rapidly if the misting cycles are interrupted. Aeroponic system needs a short cycle timer that controls the nutrient pump and runs the pump for a few seconds every couple of minutes.....
- 14 Nov 2017 @ 08:43