At present, the temperature difference between day and night is gradually increasing, the light intensity is weakened, and the light time is shortened. However, the weather is still hot when the weather is fine and fine, and the "autumn tiger" often shows off. The current greenhouse management is no longer blindly shading and cooling, but the environment in the shed should be adjusted in time according to weather changes to facilitate the healthy growth of vegetables.

In fine weather, prevent high temperature and fine weather, the temperature in the shed can still reach about 35°C, especially beware of the danger of "autumn tiger". When the temperature in the shed exceeds 35°C, it is necessary to find a way to reduce the temperature in the shed, which can be solved by measures such as setting up sunshade nets, operating in-row crop straws, and watering frequently under the premise of increasing the air outlet. The current light intensity is gradually weakening, pay attention to the shade net covering time from 11 am to 2 pm, do not cover too long, so as not to affect the normal photosynthesis of vegetables. High night temperature and strong respiration will consume more photosynthetic products, resulting in high jointing, yellow leaves, and lengthy seedlings. Therefore, in addition to reducing the daily temperature in management, it is necessary to appropriately control the night temperature to minimize the consumption of photosynthetic products.

Prevent weak light in continuous cloudy weather. Never cover the sunshade net in continuous cloudy weather to ensure the light intensity required for crop growth. Avoid weak light to reduce the synthesis of photosynthetic products and cause weak plant growth. At the same time, we must do a good job of humidity control. Plants often wilt after continuous cloudy days, and the direct cause is that the loss of water is greater than the absorption. The temperature rises quickly after a sunny day, especially when there is a high temperature exceeding 35°C, the air humidity in the shed decreases rapidly, making the delicate growth points unable to withstand the high temperature, and the moisture evaporates in a short time, causing rotten head. After the continuous cloudy day turns fine, it is recommended to cover the shading net in time to reduce the light intensity in the shed, so that the plants have a slow process of adapting. Spray clear water in the shed to increase the air humidity, thereby reducing the evaporation of water from the leaves.

Prevent high humidity in rainy weather. Watch the weather forecast in time. When the forecast rainfall is not heavy, you don’t need to close the vents. When heavy rain is forecast, you can close the vents before the heavy rain comes. Do not operate prematurely. The front face vents should ensure that no water enters. It can be left on all the time, and all vents should be opened immediately after the heavy rain is over to reduce the temperature and humidity in the shed, reduce nutrient consumption, and avoid the occurrence of diseases caused by high humidity in the shed.

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