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                                温室内遮阳网的性能

                                2021-6-10??????浏览:

                                遮阳网又称寒冷纱、遮阴网,这是聚乙烯、聚丙烯和聚酰胺等为原料,经过二次加工制作拉成扁丝,编织而成的一种网状材料。遮阳网具有以下性能:


                                1.削弱光强、改变光质  在纺织结构和疏密程度基本一致的情况下,不同颜色遮阳网的遮光率不同,以黑色网遮光率最大,绿色网次之,银灰色网最小。遮阳网对散射光的透过率要比总辐射高,网内作物层间的光照分布均匀,银灰色网内散射辐射比陆地高。

                                2.降低地温、气温和叶温  遮阳覆盖显著地降低根际附近的温度,主要是地表及其上、下二三十厘米的地气温。


                                3.减少田间蒸发量  遮阳覆盖可以抑制田间蒸散量,地面蒸散量的减少与遮阳网透光率变化基本一致,大棚覆盖遮阳网下,农田蒸散量比露地少。

                                4.减弱田间暴雨冲击  大大减弱了雨滴对地面的冲击力,露地植株因暴雨冲击而严重受损,网内安然无恙。

                                遮阳网可以有效改善作物光合作用,提高产品品质。


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