Some canopies have narrow strips of metal or wood to provide either sunlight or shade, depending on the position of the sun.
2
利用半被动式太阳能地下热交换贮能增温系统为塑料大棚加温。
The heating efficiency of heat exchange system with solar energy under ground in vinyl-house was evaluated.
3
目前，光伏太阳能蔬菜大棚建设技术都能种植光照要求高的茄果类蔬菜，意味着该技术已经成熟。
At present, the technology of the vegetable greenhouses photovoltaic solar energy construction can be demanding solanaceous fruit vegetable planting illumination, means that the technology is mature.
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