Compared to traditional single-span arched greenhouses or solar greenhouses, multi-span greenhouses offer unparalleled advantages for large-scale production:
Exceptionally high land utilization: By eliminating gaps between individual structures, land utilization exceeds 90%, making them particularly suited for large-scale, intensive commercial production.
Highly controllable production environment: The spacious, unified interior facilitates the installation of advanced environmental control equipment (such as shading, ventilation, cooling, heating, supplemental lighting, etc.), enabling precise regulation of environmental factors like temperature, humidity, light intensity, and CO₂ concentration to create optimal growing conditions for crops.
Facilitates mechanization and automation: The expansive space provides ample room for automated equipment. From automatic seeders and transplanters to automated irrigation vehicles, logistics transporters, and even robotic harvesters, these systems significantly reduce labor costs and enhance production efficiency.
Stable production performance: Robust structural design (high wind and snow load resistance) combined with advanced environmental control capabilities enable the greenhouse to withstand adverse external weather conditions, ensuring year-round, stable, and balanced agricultural product supply.
Smart Management: As an ideal platform for IoT and big data technologies, multi-span greenhouses readily upgrade to smart agriculture cloud platforms, enabling remote monitoring, data analytics, and intelligent decision-making.
Primary Structure and Covering Materials
The structure forms the foundation of a multi-span greenhouse's stability.
Main Structure: Typically employs hot-dip galvanized steel frames for corrosion resistance and strength. Key components include:
Pillars: Primary load-bearing elements.
Gutters: Core connecting components serving both drainage and as tracks/support beams for equipment installations (e.g., shading systems, sprinkler systems).
Arches and Trusses: Form the greenhouse roof, ensuring overall structural integrity.
Covering Materials: Diverse options with distinct characteristics:
Glass (Venlo Greenhouse): Highest light transmission, exceptionally long lifespan, and aesthetically pleasing. Preferred for high-end cultivation (e.g., high-value fruits/vegetables, flowers, seedling R&D).
Plastic film: Lowest cost with rapid construction speed, but relatively shorter lifespan and lower light transmission retention.
Polycarbonate panels (PC sun panels): Combines glass's high light transmission with film's lightweight and impact resistance, offering excellent thermal insulation. A highly cost-effective choice overall.
