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反光幕属于保护地蔬菜生产的辅助设施,冬春季节在日光温室栽培畦的北侧或靠后墙部位张挂反光幕,有较好的增温补光作用。反光幕是聚酯镀铝膜,幅宽1米,两幅镀铝膜连接起来形成2米高的反光幕。当太阳光照射到反光幕,然后再反射到3米范围内的地面和作物上,可增加光照5000勒克斯,增光率为33%,提高地温和气温2℃左右。距离反光幕越近,增光越多,温度也越高,随着距离的增加而递减。
Reflective curtains belong to the auxiliary facilities for the production of vegetables in the protected areas. During the winter and spring seasons, the reflective curtains are hung on the north side of the cultivation ridge in the solar greenhouse or against the back wall. Reflective curtain is polyester film, width of 1 m, two aluminum film connected to form a 2-meter-high reflective screen. When the sun shines on the reflective screen, and then reflected to the ground and crops within 3 meters, can increase the light 5000 lux, the rate of increase of 33%, increase the temperature and temperature of about 2 ℃. The closer to the reflective screen, the more light, the higher the temperature, as the distance decreases.