NFT enables continuous nutrient supply with minimal water consumption. Structure and optimisation for cannabis cultivation.
Nutrient Film Technique (NFT) is an efficient hydroponic approach:
**NFT operating principle:**
Thin nutrient film flows continuously over roots. Upper root area remains airy, lower root area in nutrient solution.
**NFT system structure:**
*Growth channels:*
- PVC pipes or special NFT channels
- 3-6 inch diameter
- 2-4% slope for flow
- Holes for net pots
*Pump system:*
- Small, continuously running pump
- Timer for interval operation possible
- Backflow system to the reservoir
- Backup pump recommended
*Reservoir and control unit:*
- 50-100 litres depending on the number of plants
- Level control important
- Aeration of the reservoir
- Temperature management
**NFT advantages:**
- Minimised water consumption
- Continuous nutrient supply
- Good oxygen supply
- Space-saving and scalable
**NFT disadvantages:**
- Pump failure = rapid plant death
- Clogging possible
- Less forgiving
- Experience required
**System optimisation:**
*Flow rate:*
- 1-2 litres per minute per channel
- Even distribution
- No waterlogging or dryness
- Adjustment according to plant size
*Channel design:*
- Slight gradient (1:50)
- No sharp bends
- Easy cleaning possible
- Accessible for maintenance
*Root management:*
- Avoid overgrowth
- Regular inspection
- Do not block channels
- Prune when necessary
**Nutrient programmes:**
- Lower EC than other hydro systems
- Continuous low fertilisation
- More frequent adjustments
- Precise pH control
NFT is ideal for experienced growers looking for maximum efficiency and control.
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