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露、霜、雾是在空气中的水汽含量超过饱和时,出现的一种凝结现象.其中露.霜是水滴或冰晶在地表或物表面上的凝聚体.而雾则是悬浮在地面上空的水滴或冰晶的凝聚物.对降露、降霜、降雾的测定,国外曾有过报道,但在农田林带(网)的环境下对降露、霜、雾的影响国内尚未见介绍.我们采用简单易行的方法,即选硬纸板若干张,先用刀切成10×20厘米的长方形,对折,再在中心用刀切成5×5厘米的空心方块,使成25个平方厘米的面积(如图所示).纸板上下与边缘涂以石蜡,
Dew, cream, fog is a condensation phenomenon in the air when the water vapor content exceeds saturation, which is the condensation of water droplets or ice crystals on the surface or surface, while the fog is suspended above the ground Water droplets or ice crystals.Degree of dewfall, frost and fog reduction, has been reported in foreign countries, but in the field of forest belt (net) on the dew, frost, fog has not been introduced in China.We use Easy way, that is, select a number of cardboard, first with a knife cut into 10 × 20 cm rectangle, fold, and then cut into the center with a knife 5 × 5 cm hollow square, making a 25 square centimeter area (As shown) .Paperboard coated with wax,