不同覆盖材料对苗床补光效应的研究

在放帘后的温室内 ,日光灯在苗床上同一高度平行悬挂 ,用反光膜、蓝膜和无覆盖进行三种不同的覆盖处理 ,测定灯下与灯间下各点的光强 ,研究各处理灯下与灯间下光强分布规律和对苗床上的增光效果。结果表明 ,覆盖材料对光强分布规律影响不大 ,蓝膜对苗床上灯下与灯间下各点光强增加效果不显著 ,而反光膜对上述各点光强增加显著 ,说明反光膜的反光与聚光效果非常好。

Study on the Effect of Seedbed Light Replenishing by Various Covering Materials

In covering greenhouse,the same height lights were hung parallelly on seedbed,and the seedbed was separately covered by a reflect light plastics,a blue plastics or uncovering to determine the light intensity and to study the light intensity distribution regularity and the effect of increased light on the seedbed.Results showed that the light intensity distribution regularity almost was not affected by covering materials.The light intensity was not increased obviously by the blue plastics ,while it was increased obviously by the reflect light plastics.It was showed that the reflecting and condensing capability of the reflect light plastics was very strong..