Two Common Systems In Hydroponics

Plants grown in non circulating system

*Non circulating system: In this method ,tray, plastic bucket or bottles etc. can be used. Before sowing of seedlings , the bottle should be filled with nutrient solution . If seedlings are sown in bottle or bucket then 3-4 holes should be kept for aeration.

 *Circulation System: In this method ,tray made of galvanizing iron is placed on a stand which is connected to a tank with the help of a plastic pipe .From this tank,nutrient solution is provided to the tray with the help of a pipe. The cork sheet which is above the tray, is given holes according to the distance required by the plant.For example,spacings for Lettuce,Tomato,Strawberry are 20cm x 20cm,50cm x 40cm,30cm x 30cm respectively.

pH meter and EC meter

 Seedlings with appropriate age with sponge is placed into the hole.After sowing of seedlings , circulation of nutrient solutions from the tank to the tray through the pump is conducted at least 8-10 hours daily to enhance the supply of oxygen to the plants.At least 6-8cm water should be ensured in the tray.Normally , nutrient solution should be added to the tray after 12-15days intervals.pH should be maintained between 5.8-6.5. If the value of pH is above 7, then deficiency symptoms due to the lack  of Iron,Manganese,Molybdenum, and other micronutrients,are observed. In this case ,pH should be adjusted by adding Hydrochloric acid or Phosphoric acid or Nitric acid. Again, if pH remains below 5.8, then pH should be adjusted by adding NaOH or KOH. EC of nutrient element in solution should be kept between 1.5-2.5ds/m. If the value of EC remains above 2.5ds/m, then distilled water should be added.Monitoring the value of pH and EC with the help of pH and EC meter should be done every morning and evening.