1. Structure: The frame of a polyhouse is typically made of lightweight materials such as galvanized steel or PVC pipes formed into hoops. These hoops are then anchored into the ground to provide stability.
2. Covering: The frame is covered with a single or double layer of polyethylene film. This material is lightweight, durable, and provides good light transmission while retaining heat and humidity within the structure.
3. Temperature Regulation: Polyhouses trap solar radiation, creating a warmer microclimate inside compared to the external environment. Ventilation is essential to prevent overheating, and polyhouses often feature roll-up or sliding sidewalls and roof vents for airflow control.
4. Humidity Control: While polyhouses naturally retain humidity, proper ventilation helps prevent excess moisture buildup, which can lead to fungal diseases and other issues.
5. Versatility: Polyhouses can be used for a variety of purposes, including growing vegetables, flowers, herbs, and ornamental plants. They are suitable for both small-scale and commercial operations.
6. Cost-Effectiveness: Compared to traditional glass or rigid plastic greenhouses, polyhouses are more affordable to construct and maintain. They also require less structural support, reducing material and labor costs.
7. Season Extension: Polyhouses allow growers to extend the growing season by providing protection from frost, wind, and other adverse weather conditions. This enables earlier planting in spring and later harvesting in fall, increasing overall crop yield and quality.
8. Crop Protection: Polyhouses provide a barrier against pests, birds, and other animals that may damage crops. This reduces the need for chemical pesticides and promotes healthier plant growth.

Overall, polyhouses are a practical and cost-effective solution for growers looking to create a controlled environment for plant cultivation, especially in regions with challenging climates or limited growing seasons. They offer flexibility, protection, and increased productivity for a wide range of agricultural and horticultural applications.