Academic
How to build a DFT hydroponic system greenhouse? Yecai Xia Technology: From greenhouse selection to
作者: 时间: 2026-08-29
The DFT (deep flow) hydroponic system, as an efficient, stable, and controllable leafy vegetable cultivation technology, highly relies on the greenhouse environment to exert its advantages. The greenhouse provides a "shell" for the DFT system, protecting crops from wind, rain, extreme temperatures, and pests and diseases; The DFT system injects a "core" into the greenhouse, achieving high-density, high-quality, and high-efficiency leafy vegetable production.
It can be said that the greenhouse and DFT hydroponic system are a golden combination of "1+1>2". However, many growers tend to fall into two extremes when planning projects: either focusing only on the DFT equipment itself and neglecting greenhouse support, resulting in the system's performance not being fully utilized; Either only focusing on greenhouse construction without understanding the special requirements of DFT systems, resulting in investment waste.
As a member unit of the Facility Agriculture Association with 16 independent intellectual property rights and three major product lines of DFT/NFT/plant factories, LEAFYMAN Technology has provided DFT hydroponic systems and greenhouse matching solutions for more than 400 professional planting companies worldwide. Today, we will combine practical experience to comprehensively analyze the design points, construction standards, and supporting solutions of DFT hydroponic system greenhouse, helping you create an efficient, durable, and profitable modern hydroponic greenhouse.
1、 The Five Core Requirements of DFT Hydroponic System for Greenhouse Environment
Although DFT hydroponic systems have stronger buffering capabilities than NFT systems, they still have clear requirements for greenhouse environments. Only by meeting the following five conditions can the stable operation of the system and high crop yield and quality be ensured.
1. Temperature stability
Optimal temperature: 18-25 ℃ (daytime), 12-18 ℃ (nighttime).
Optimal liquid temperature: 15-20 ℃.
Greenhouse requirements: Good thermal insulation performance, equipped with internal and external shading systems, wet curtain fan cooling system, hot air fan or water heating system.
2. Adequate lighting
Optimal light intensity: 200-300 μ mol/m ²/s (PPFD).
Greenhouse requirements: Use high transmittance covering materials (such as scattering glass, PO film, PC board) to ensure a transmittance of ≥ 85%; Equipped with internal sunshade to prevent burns from strong sunlight in summer.
3. Ventilation and humidity control
Optimal humidity: 60% -75%.
Greenhouse requirements: Install top ventilation windows, side windows, and circulating fans to ensure air circulation, reduce humidity inside the greenhouse, and minimize the occurrence of diseases.
4. Water quality and supply guarantee
Water quality requirements: clean water source, no heavy metal pollution, EC value should not be too high.
Greenhouse requirements: equipped with a reservoir (capacity ≥ daily water consumption of the system), water treatment equipment (filters, reverse osmosis optional), to ensure stable water supply.
5. Power and automation matching
Electricity load: The total power of water pumps, environmental control equipment, fill lights, etc. needs to be accurately calculated.
Greenhouse requirements: Equipped with a stable power supply system (recommended dual circuit or backup generator), with reserved intelligent control interfaces to meet the needs of subsequent automation upgrades.
2、 Comparison of Greenhouse Types Suitable for DFT Hydroponic System
According to the project scale, investment budget, and climate conditions, the DFT hydroponic system can be adapted to various types of greenhouses. Ye Caixia Technology compares the following for you:
Greenhouse type, cost (yuan/㎡), insulation performance, light transmittance, recommended index for applicable scenarios
Multi span glass greenhouse 350-600, excellent 90%, large-scale commercial base, agricultural park, sightseeing agriculture ★★★★★
Multi span PC board greenhouse 300-450, excellent 85% in cold northern regions, annual production ★★★★★
Multi span film greenhouse (large arch greenhouse) 150-250 liang 85% in warm southern regions, low-cost investment ★★★★
Sunlight greenhouse 200-350, 75% better in northern high-altitude regions, winter production ★★★★
Single arch shed 80-150% difference 85% short-term production in spring and summer, limited budget ★★★
Suggestion from Ye Caixia Technology:
Northern regions: Priority should be given to choosing multi span PC board greenhouses or high-efficiency solar greenhouses to ensure winter insulation performance and achieve annual production.
Southern region: Priority should be given to choosing multi story film greenhouses, combined with ventilation and cooling systems, to balance investment and effectiveness.
High end project/plant factory level: Choose a connected glass greenhouse, combined with a comprehensive environmental control system and manual lighting, to create a benchmark project.
It can be said that the greenhouse and DFT hydroponic system are a golden combination of "1+1>2". However, many growers tend to fall into two extremes when planning projects: either focusing only on the DFT equipment itself and neglecting greenhouse support, resulting in the system's performance not being fully utilized; Either only focusing on greenhouse construction without understanding the special requirements of DFT systems, resulting in investment waste.
As a member unit of the Facility Agriculture Association with 16 independent intellectual property rights and three major product lines of DFT/NFT/plant factories, LEAFYMAN Technology has provided DFT hydroponic systems and greenhouse matching solutions for more than 400 professional planting companies worldwide. Today, we will combine practical experience to comprehensively analyze the design points, construction standards, and supporting solutions of DFT hydroponic system greenhouse, helping you create an efficient, durable, and profitable modern hydroponic greenhouse.
1、 The Five Core Requirements of DFT Hydroponic System for Greenhouse Environment
Although DFT hydroponic systems have stronger buffering capabilities than NFT systems, they still have clear requirements for greenhouse environments. Only by meeting the following five conditions can the stable operation of the system and high crop yield and quality be ensured.
1. Temperature stability
Optimal temperature: 18-25 ℃ (daytime), 12-18 ℃ (nighttime).
Optimal liquid temperature: 15-20 ℃.
Greenhouse requirements: Good thermal insulation performance, equipped with internal and external shading systems, wet curtain fan cooling system, hot air fan or water heating system.
2. Adequate lighting
Optimal light intensity: 200-300 μ mol/m ²/s (PPFD).
Greenhouse requirements: Use high transmittance covering materials (such as scattering glass, PO film, PC board) to ensure a transmittance of ≥ 85%; Equipped with internal sunshade to prevent burns from strong sunlight in summer.
3. Ventilation and humidity control
Optimal humidity: 60% -75%.
Greenhouse requirements: Install top ventilation windows, side windows, and circulating fans to ensure air circulation, reduce humidity inside the greenhouse, and minimize the occurrence of diseases.
4. Water quality and supply guarantee
Water quality requirements: clean water source, no heavy metal pollution, EC value should not be too high.
Greenhouse requirements: equipped with a reservoir (capacity ≥ daily water consumption of the system), water treatment equipment (filters, reverse osmosis optional), to ensure stable water supply.
5. Power and automation matching
Electricity load: The total power of water pumps, environmental control equipment, fill lights, etc. needs to be accurately calculated.
Greenhouse requirements: Equipped with a stable power supply system (recommended dual circuit or backup generator), with reserved intelligent control interfaces to meet the needs of subsequent automation upgrades.
2、 Comparison of Greenhouse Types Suitable for DFT Hydroponic System
According to the project scale, investment budget, and climate conditions, the DFT hydroponic system can be adapted to various types of greenhouses. Ye Caixia Technology compares the following for you:
Greenhouse type, cost (yuan/㎡), insulation performance, light transmittance, recommended index for applicable scenarios
Multi span glass greenhouse 350-600, excellent 90%, large-scale commercial base, agricultural park, sightseeing agriculture ★★★★★
Multi span PC board greenhouse 300-450, excellent 85% in cold northern regions, annual production ★★★★★
Multi span film greenhouse (large arch greenhouse) 150-250 liang 85% in warm southern regions, low-cost investment ★★★★
Sunlight greenhouse 200-350, 75% better in northern high-altitude regions, winter production ★★★★
Single arch shed 80-150% difference 85% short-term production in spring and summer, limited budget ★★★
Suggestion from Ye Caixia Technology:
Northern regions: Priority should be given to choosing multi span PC board greenhouses or high-efficiency solar greenhouses to ensure winter insulation performance and achieve annual production.
Southern region: Priority should be given to choosing multi story film greenhouses, combined with ventilation and cooling systems, to balance investment and effectiveness.
High end project/plant factory level: Choose a connected glass greenhouse, combined with a comprehensive environmental control system and manual lighting, to create a benchmark project.