GREENHOUSE

Greenhouse film

1. Film Selection Guide for Key Fruits

Fruit Type	Recommended Film	Critical Parameters
Strawberries	3-layer co-extruded (0.12mm)	85% PAR + UV-B blocking
Grapes	Diffused light (0.15mm)	50% haze, anti-condensation
Citrus	IR-blocking (0.18mm)	≤45% IR transmission
Melons	Clear/blue spectrum (0.10mm)	90% PAR, EAR ≥0.7

Specialty Films:

Photoselective (e.g., red-transmitting for 20% faster berry ripening)
NIR-reflective (reduces heat stress in stone fruits)

Online orders

2. Climate Optimization Features

✔ Temperature Control

Daytime: Maintains 25-32°C (with 40-60% cooling load reduction)
Nighttime: 4-7°C warmer than ambient (thermal retention)

✔ Light Management

PAR transmission: 80-92% (adjustable for DLI requirements)
UV manipulation:

UV-B (280-315nm) blocking for thicker fruit skins
UV-A (315-400nm) transmission for anthocyanin development

3. Structural Considerations

Film Attachment System:

Batten tape + wiggle wire (withstands 60km/h winds)
Double-layer inflated (5cm air gap for -15°C winters)

Ventilation Design:

Automatic roof vents (20% of floor area minimum)
Sidewall roll-ups (1.5m height for orchards)

4. Fruit-Specific Benefits

Fruit	Key Advantage	Yield Improvement
Blueberries	Enhanced anthocyanins	+15% marketable yield
Peaches	Reduced chilling injury	+20% fruit size
Raspberries	Extended harvest season	3-5 weeks earlier fruiting

5. Durability & Maintenance

✔ Lifespan: 3-5 years (with anti-UV treatment)
✔ Cleaning: Monthly soft brush wash (maintains 95% light transmission)
✔ Winterization: Snow load rating ≥75kg/m²

Economic Analysis

Factor	Poly Film Greenhouse	Glasshouse
Setup Cost	$15-30/m²	$200-400/m²
Energy Use	0.5-1.2kWh/m²/year	2-3kWh/m²/year
ROI Period	1-2 harvests	5-7 years

Advanced Technologies:
→ Smart films (light-adjusting nanoparticles)
→ Anti-bacterial coatings (reduces fungal diseases)
→ Integrated solar panels (<10% light reduction)

(Complies with ISO 14001 (sustainability) and FDA 21 CFR (food-contact safety))

Keywords: Fruit greenhouse film, PAR optimization, Photoselective plastic, Protected horticulture

Technical Support Services:
→ Light transmission modeling
→ Crop-specific film formulation
→ Automated climate control integration

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