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The high temperature in summer is very unfavorable for the growth and development of crops. In order to ensure the growth and development of crops, there are many countermeasures that can be used, such as watering, watering, and natural ventilation. In addition to this basic countermeasure, if you want to reduce the temperature of the arch shed, the sun exposure, the sunshade net is a very good choice. .

First of all, let’s understand the role of the sunshade net. The sunshade net has a huge role. Let’s talk about it in detail:
1. Block sunlight and reduce light intensity
According to the different colors, the light transmittance of the shade net is also different, but in general, it is between 35% and 75%. Affected by high temperature, to ensure the normal growth of crops. Among them, the black shading net has a relatively large absorption rate of light, and the downward scattering is far lower than that of silver-gray. Therefore, under the same specifications, the light transmittance of black shading net is less than silver-gray, while the shading net of the same color, Light transmittance under strong light > under weak light.

2. Lower the temperature, reduce the high temperature
The temperature in summer is basically above 30 ℃, and sometimes the high temperature of 40 ℃ is not a problem, and the ground temperature will only be high or low. Generally, the suitable growth of temperature-loving crops requires a temperature below 30 °C. If the temperature exceeds this temperature, the normal growth of the plant will definitely be greatly affected. By covering the shading net, we can see from our observations that at 14:00 in the afternoon, when the temperature is high, the black shading net can be lowered by 3.5-4.5 ℃, and the silver-gray is less, but there is also 2-3 ℃. The cooling effect is still very good, and the plants will grow better at the right temperature.

3. Maintain moisture and improve soil moisture
In summer, the high temperature and strong light cause the soil moisture to evaporate quickly and the amount of evaporation is large, which aggravates the drought. By covering the sunshade net, the evaporation of soil moisture is significantly reduced. After comparison, only 30% to 40% of the open field is used, which well maintains the moisture content and improves the soil moisture. For freshly sown seeds, a high germination rate can be guaranteed, while for general plants, a variety of physiological obstacles due to high temperature can be greatly reduced.

4. Weatherproof and impact-proof in summer to reduce damage
There are many wind and rain in summer. By covering the sunshade net, it can not only reduce or avoid the damage of wind to crops, but also prevent part of the rainwater from falling into the furrow surface, avoid the impact of rainwater on the ground and damage the leaves, reduce the soil compaction, avoid the difficulty of root breathing, and reduce the death rate. seedling phenomenon.

Shade nets are widely used, and can reduce market demand in the production of vegetables and fruits, and increase production and income. With the expansion of the total area of ​​use, we must pay attention to improving the management of related technical levels. Different stages and different planting purposes use different nets. In addition, whether the sun is shining, the average temperature is high or low, and the illuminance all endanger the application of sunshade nets. Everyone should insist on seeking truth from facts and cover according to the basis. Otherwise, it is very easy to cause the main stem. Steep growth, loss of green, and even cause pests and diseases, endangering the quality and quality of vegetables and fruits.