In summer, if you do not pay attention to the release of wind, the temperature in the shed is more than 40°C, which is very unfavorable to the growth of vegetables. Even the cucumbers that prefer high temperature environment may have abnormal growth. How to manage it?
First, timely cooling: When the sun is too strong, the temperature in the shed exceeds 30°C, and when the cooling effect is still not reached through the ventilation, the temperature-reducing measures shall be taken in time, such as setting up a sunshade net, splashing mud, and spraying cooling agents outside the shed. , can play an effective cooling effect. At the same time, when reminding friends of vegetable farmers to use shade nets, they must promptly close them at four o'clock in the afternoon and on cloudy days so as not to affect photosynthesis.
The second is to pick the old leaves less: Generally speaking, when winter falls, it is required to remove the lower leaves, especially the old leaves and the yellow leaves, because the humidity in the winter shed is relatively large, while the old leaves have weaker disease resistance. After removing old leaves, prevent the invasion of the disease from the old leaves. In summer, in addition to heavy rain, the greenhouse is ventilated almost day and night, and the humidity in the greenhouse is small. It is recommended that all the lower leaves not be removed. These old leaves can block the irradiation of strong light and play a role in shading, which can effectively prevent rapid ground temperature. Increased.
The third is watering to work: In summer, the amount of water evaporation is large. Many vegetable farmers think that flood irrigation can be used. In fact, it is easy to injure the root system. It is recommended to use small water for pouring, which can meet the water demand of crops, but also To reduce the effect of the greenhouse temperature. As a reminder, don't water it at noon on sunny days, otherwise it may cause a sudden drop in rhizosphere soil temperature, causing plants to wilt or even die.
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