GRP新型温室覆盖膜温热特性的研究

为解决现有温室塑料覆盖膜使用寿命短、变光性能差、造价高的问题, 研制成功了经济耐用、变光性能优的GRP新型覆盖材料。在实验基础上, 运用现代数理统计方法, 初步分析了GRP温室覆盖材料的温热特性, 防雾和防滴性能及对栽培作物产量的影响。结果证明, GRP膜具有良好的温热性与保温性, 在最低气温条件下, 试验温室室内最低气温比对照温室室内气温高2℃, 而最高气温均为32℃; 在阴天, GRP膜的增温效果较EVA膜好,最好时比对照温室内气温高3 30℃。另外, 在实验期间, 试验温室从未见过起雾, 滴水也很少, 说明新材料具有良好的防雾、防滴性能。因此, GRP膜对作物生产具有明显的增产效应, 与对照温室相比, 增产幅度高达16 2%。

The Research on Thermal Property of GRP Film for Greenhouse

GRP covering material, which had good property on transparency chargable with light intensity and economic character, was developed in order to resolve the short life, the poor property on transparency chargable with light intensity,the high production cost of extant films. The thermal property, no-drop-forming property, fog inhibition of GRP film and its effect on yield were analyzed with the modern mathematical statistics basing on the field experiment. By comparing GRP covered greenhouse with EVA covered greenhouse, the results showed that the thermal property and the poor property on transparency chargable with light intensity of GRP film were better than that of EVA film .The minimum air temperature inside GRP covered greenhouse was increased by 2℃ compared with that inside EVA covered greenhouse, while the maximum air temperatures inside two greenhouses were 32℃ in the warming day. Further, the GRP film could maintain higher air temperature at 3.30℃ than the EVA film in the condition of overcast sky. In addition, fog wasn't exhibited ever in GRP covered greenhouse, and dripping water was very little during experiment, thus the GRP film had better fog inhibition and no-drop-forming property. For these reasons, the GRP film increased yield by 16.2% than EVA film.