What Is a Hoop Tunnel?
A hoop tunnel is an agricultural structure formed by arched poles covered with materials such as transparent plastic film, non-woven fabric, cold gauze, or insect nets. These tunnels protect crops from wind, cold, and pests.
Uses of Hoop Tunnels
Hoop tunnels are widely utilized in agriculture for heat retention and pest control. They are used in tunnel cultivation, which is effective for various crops including watermelons, melons, pumpkins, radishes, and others. The specific covering material used on hoop tunnels can significantly impact crop yield and quality.
Features of Hoop Tunnels
Advantages
Hoop tunnels offer protection from wind and insects and help in maintaining suitable temperatures for crop growth. Covering materials like plastic film protects crops from frost and prolong the harvesting period, while insect netting is particularly beneficial for leafy vegetables prone to insect infestation.
Disadvantages
One drawback is the need for meticulous installation to prevent gaps that could allow pests to enter. Additionally, if eggs are already present on the crops before covering, the effectiveness of the tunnel may be compromised.
Types of Hoop Tunnels
1. Classification by Material
Hoop tunnels are commonly made of materials like steel pipe, wood, plastic, and galvanized steel. Some steel pipes are resin-coated for added durability and rust prevention.
2. Classification by Features
Features vary among products, with some offering waterproof tips, special steel pipes to withstand snow and wind, and markers for embedding depth.
How to Select Hoop Tunnels
When choosing hoop tunnels, consider size and strength relative to the crop’s requirements and row width. Larger sizes may be preferable for insect control to prevent contact between the crops and covering material. For tunnels exceeding 10 meters, thicker materials are recommended for wind resistance. Note that embedding the tunnels into the soil reduces their height.
How to Use Hoop Tunnels
Hoop tunnels are installed by inserting their tips into the soil over crop ridges. The effectiveness of the tunnels can be enhanced by attaching appropriate covering materials, such as plastic film for early plant growth, non-woven fabric for frost protection, cold gauze for sunlight and temperature control, and insect netting for pest prevention.