2019-11-29 来源: 作者: 点击: Time: 2019-11-29 Source: Author: Hits: Times
At present, the price of sunshade nets on the market is not expensive, but we must also pay attention to selecting high-quality and low-cost sunshade nets when buying. Today we come to understand how to properly use sunshade nets in greenhouse cultivation.
First, use the framework of the arch shed to cover the sunshade net on the top, leaving a ventilation band of 60-80 cm on it. If it is covered with a film, the sunshade net cannot be directly covered on the film. A gap of more than 20 cm should be left to cool the wind And it should be noted that although covering the shading net can reduce the temperature, it also reduces the light intensity, which will adversely affect the photosynthesis of vegetables, so the covering time is also important, and it should be avoided all day.
We can choose to cover according to the temperature between 10 am and 4 pm. When the temperature drops to 30 ° C, the shade net can be removed, and it should not be covered on a cloudy day to reduce the adverse impact on vegetables. Achieve increased production.