Precision horticultural climate engineering parameters, solar Daily Light Integral (DLI) curves, seasonal thermal screen deployment strategy, and heating/cooling load calculations for Kunming (Spring City), Yunnan, China (Subtropical Highland (Cwb, 1,900m)).
In Kunming (Spring City), Yunnan, China, natural solar Daily Light Integral transitions from 22-28 mol/m²/day during winter solstice to 38-46 mol/m²/day at summer peak. For commercial crops like Export Cut Roses, Carnations, Lilies, Orchids, target canopy DLI requires dynamic screen management to avoid photoinhibition during midday radiation spikes exceeding 850 W/m².
Screen Specification: UV-Transmitting Photoselective Screen
Primary Cooling Strategy: High Ceiling Natural Convection
Maintaining positive day-night temperature differential (DIF) and nighttime dehumidification minimizes condensation on cold structural glass surfaces, suppressing Botrytis and powdery mildew spore viability.
Major protected cropping varieties grown at scale in this regional cluster: Export Cut Roses, Carnations, Lilies, Orchids.