论文部分内容阅读
农膜作为棚室的主要覆盖材料之一,透光率、保温性和防流滴性是其主要的物理性能。为确保农膜良好的物理性能,在安装和使用时必须注意以下事项。1.棚室农膜在安装使用之前必须存放在阴凉干燥的地方,严防日晒雨淋。如在冬季安装,安装前,须将农膜放置在室内温度2～3℃下。2.棚室结构中铁和金属线应很好地电镀,不得使用脏污和生锈的构件。避免使用暴露的金属线和生产锐角,以防撕破农膜。3.安装时,须将农膜拉紧拉平,否则会影响使用效果。例如希腊 PEP 利得膜有透光、保温、防积尘等
As one of the main covering materials for greenhouse, plastic sheeting is the main physical property of light-transmittance, thermal insulation and drop-proofness. In order to ensure the good physical properties of plastic sheeting, the following points must be observed when installing and using. 1. Plastic greenhouse film before installation must be stored in a cool dry place, prevent the sun and rain. If installed in winter, before installation, the agricultural film should be placed in the room temperature 2 ~ 3 ℃. 2. The structure of the greenhouse iron and metal lines should be well plated, shall not use dirty and rusty components. Avoid using exposed wires and producing acute angles to prevent tearing of agricultural film. 3. Installation, the plastic sheeting should be leveled, otherwise it will affect the use of results. For example, Greece PEP film has a transparent, heat preservation, anti-dust and so on