As the temperature in the greenhouse is too high (the maximum temperature in the greenhouse reaches 40°C at noon), the vegetables grown in the greenhouse will grow poorly, and the tomato leaves will burn like a leaf edge, causing serious fruit drop and a large amount of sunburn. Fruit and umbilical rot disease, legumes and vegetables are severely falling, etc. These are caused by high temperature in the shed. The following method can be used to reduce the temperature inside the shed to prevent the occurrence of high-temperature obstacles in the shed. Increase ventilation and reduce temperature Pay attention to open the upper and lower air outlets of the greenhouse, allow the cold air outside the greenhouse to enter the shed, and form convection with the hot air in the shed to accelerate the discharge of hot air, which is conducive to the reduction of the temperature in the shed. It is necessary to remind the vegetable farmer that when the air is released, a windshield film should be installed below the air outlet to prevent the cold air from blowing directly onto the fruit surface of the vegetables, resulting in the appearance of rind and cracks in the fruit. Use shade net cooling When the greenhouse temperature cannot be controlled within the required range for the growth of suitable vegetables through the ventilation method, it is better for the vegetable grower to use the shade net to cool the shade. The vegetable grower should put down the shade net when the temperature in the morning shed is close to the maximum temperature suitable for growing vegetables. When the temperature in the afternoon shed is lower than the maximum temperature for the growth of suitable vegetables, the shade net can be rolled up, but pay attention to put down the shade net. Can not block the outlet. In the purchase of shade nets, vegetable farmers can buy an opacity rate of about 60%, because this kind of shade net can play the role of shading and cooling, prevent sunburn fruit, and allow some of the light to reach the interior of the greenhouse. Improvement of photosynthesis in vegetable leaves. Noon spray cooling At noon of summer, due to the high temperature in the greenhouse and the large evaporation of the leaves, the water absorbed by the roots could not meet the needs of transpiration of the vegetables, and the tomato leaves appeared to be rolling up. The vegetable growers can install micro-spray spray in the shed to reduce the temperature of the shed. This can also increase the air humidity in the shed, prevent the stigma from drying, promote pollination, and prevent vegetables from falling. Seasoned Scallop,Seasoned Sea Scallop,Seasoned Spicy Scallop,Seasoned Scallop Lips DALIAN HAIBAO FOODS CO., LTD. , https://www.haibaoseafoods.com