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冬季连阴天,在温室大棚悬挂反光幕可以起到补光增温作用。生产实践中有的菜农说这样做效果很好,也有的说效果不理想,为什么呢?调查发现,每个菜农悬挂反光幕的角度、高度不尽相同。那么,反光幕怎样悬挂才合理呢?反光幕悬挂的角度、高度要视季节进行适当调整。冬季太阳高度角小,反光幕一般要悬挂得矮一些,以贴近地面垂直悬挂或略倾斜为宜。如果蔬菜刚定植,反光幕主要起到提高地温、促进缓苗的作用,反光幕悬挂得要低一些,垂直悬挂即可。如果植株较大、较高,
Cloudy even in winter, hanging in the greenhouse greenhouse reflective screen can play fill light temperature effect. Some vegetable farmers in production practice said that the effect is very good, while others said that the effect is not satisfactory. Why? The survey found that each vegetable farmer hanging reflective screen angle is highly different. So, how to hang the curtain is reasonable? Light curtain hanging angle, depending on the season to a high degree of appropriate adjustments. The winter sun angle is small, reflective curtain generally hang shorter, to the ground perpendicular to the vertical suspension or slightly inclined appropriate. If the vegetables have just planted, reflective screens play a major role in improving ground temperature, promoting the role of Huanmiao, reflective curtain hanging lower, vertical suspension can be. If plants are larger, taller,