日光温室内反光膜补光的实践与理论探析

Practice and theoretic analysis of supplementing illumination in the solar greenhouse with reflecting film.

试验结果表明 ,温室后墙悬挂反光膜进行补光后 ,对温室内测定点处最大光照度值无影响 ,但平均提高测定点处水平光照度值 15 4 8% ;温室内凌晨时气温、地温、墙温和被反光膜遮掩处墙温分别比对照温室低 1 1℃、1 5℃、0 9℃和 1 8℃ ,但正午时分别比对照温室高 1 6℃、1 4℃、0 3℃和低 11 4℃。温室经济产量增加 7 4 % ,当期经济效益增加 2 1元 /m2 。

For supplementing illumination,the reflecting film is cov ered on the back wall of greenhouse.The results show that the maximum illuminati on on the measuring point does not incre ase,but the plane illumination on the me asuring point increases by 15.48%.Air te mperature,earth temperature,wall tempera ture and the temperature of wall covered by reflecting film in the greenhouse ar e respectively 1.1℃,1.5℃,0.9℃and 1.8℃ lo wer than those of the control greenhouse at 7 a.m.,air temperature,earth tempera ture and wall temperature in the greenho use are respectively 1.6℃,1.4℃ and 0.3℃ higher than those of the control greenho use,the temperature of wall covered by r eflecting film is 11.4℃ lower than that of the control greenhouse at 12 a.m. The output of the greenhouse increases by 7. 4%,the benefit increases 2.1 yuan/ m2 during the experimental period.