Aeroponic systems require
no media (Fig 1.3). The plantís root system is freely suspended in a well
ventilated reservoir. The nutrient is
delivered as a fine mist or fog via the use of spray jets and a high
pressure pump. This typically operates 24 hours per day.
Advantages of Aeroponic systems
- Provides an oxygen rich environment
- Avoids the supply, disposal and cost
problems associated with medium based systems.
- It is easy to disinfect roots and
- The absence of medium makes it easy
to inspect roots for signs of disease and feed adequacy.
- Root zone EC and pH will equal that
of the nutrient solution.
Disadvantages of Aeroponic systems
- Pump failure can result in plant
death within a few hours, especially in hot weather.
- Spray jets are prone to blockages
therefore filters and routine maintenance of the feed circuit are
- Evaporation losses are high and
unless the nutrient is replaced frequently, salt build-up can be rapid.