基于Venlo型温室夏季降温新途径试验初报

A new cooling method for Venlo-type greenhouse in summer

【目的】对Venlo型温室夏季降温新途径进行研究,为其合理化利用提供依据。【方法】将Venlo型温室原有的屋面喷淋喷头改装到遮阳网上方,分别测定温室内温度、光照强度及空气相对湿度的变化情况。【结果】采用遮阳网上喷淋对Venlo型温室夏季降温有较好的效果。当室外最高气温达41.0℃时,温室内温度始终低于室外温度,且维持在34.4～37.4℃,温室内外温差最高可达4.6℃;温室内光照强度维持在0.3万～1.6万lx,其与室外光照强度的最大降幅达86.8%;温室内空气相对湿度保持在50%～70%,适宜大部分园艺作物正常生长发育。【结论】遮阳网上喷淋有助于Venlo型温室夏季降温,该类型温室适用于生产耐高温、耐荫性作物。

[Objective]The present experiment was carried out to find out a new cooling method for Venlo-type greenhouse in order to provide references for rational utilization of Venlo-type greenhouse. [MethodJThe spray directions have been changed from roof of Venlo-type greenhouse to its sunshade net, and its effect on green house conditions such as temperature, illumination intensity and relative air humidity were studied. [Result]Spraying on sunshade net of Venlotype greenhouse has been proven quiet satisfactory in its cooling application. The internal temperature was found to be 4.6 degrees less than outside temperatures. The indoor temperatures were found to be in range of 34.4-37.4℃ when outside temperature was 41℃ The indoor illumination intensity was observed to ranged between 3000 and 16000 Ix and decreased maximum by 86.8% compared to outdoor illumination intensity. The indoor relative air humidity ranged from 50-70% which was appropriate for growth of most horticultural crops. [Conclusion]Spraying on the sunshade net was found conducive to cool the Venlo-type greenhouse in summer. This type of greenhouse was suitable for planting thermo-tolerant and shade-tolerant crops.