NFT is the abbreviation of Nutrient Film Technique, which is one of the important hydroponic technologies capable of commercial production.
The principle behind the NFT hydroponic system is simple. It can maintain a thin water film in the NFT planting tank throughout the life cycle of the crop, and the plant roots absorb the nutrient solution flowing in the tank to obtain the required nutrients and water. In addition, since part of the root system of the plant is immersed in the nutrient solution and part of the root system is exposed to the air, the contradiction between water absorption and oxygen absorption by the root system is simply and effectively solved.

The advantages of NFT flat cultivation hydroponic system include:
1. Maintenance is more convenient because there are fewer components in the system.
2. Compared with the A-frame hydroponic system, the NFT flat cultivation system has a simpler structure and is easier to install.
3. Due to the lighter weight of the entire flat cultivation system, larger leaf vegetable crops can be planted.
4. Obtain more uniform and better lighting conditions for plant growth.

5. It is easy to realize the automatic management of the production process.

Disadvantages of NFT flat cultivation hydroponic system
1. The space utilization rate is low.
2. The unit density is slightly lower than that of the A-frame hydroponic system.
3. It is difficult to harvest, especially the crops in the middle trough.
Advantages of A-Frame Hydroponics System
1. The layout will be more compact and the space utilization rate will be higher, because the NFT planting slots can be stacked layer by layer.
2. The yield is higher, usually slightly higher than the NFT flat cultivation hydroponic system.
3. Beautiful appearance, especially suitable for leisure and sightseeing agriculture.

Disadvantages of A-Frame Hydroponic Systems
1. A higher power pump is required to ensure that the nutrient solution can reach the same level in each NFT tank.
2. It is difficult to set planting technical parameters.
3. Uneven lighting conditions, especially for the bottom plants, may require the use of LED fill lights.
4. The types of crops that can be planted are limited.

Generally speaking, the NFT flat cultivation hydroponic system is suitable for crops with large plant size or high plant height, such as lettuce, spinach and basil. The A-frame hydroponic system is suitable for plants with smaller space, faster yield, short root system and short plants, because they limit the maximum growth of plants, such as bitter chrysanthemum, lettuce, rape, lettuce etc.