Avoid changing the light receiving angle of the greenhouse at will. The angle of the greenhouse for growing cucumbers has been scientifically proven for a long time. Do not change the north-south span, height, and backslope angle at will.
Avoid concentrated fertilization during colonization. A variety of chemical fertilizers, especially nitrogen fertilizers, produce a large amount of harmful gases when they are humid and hot. If they are concentrated in the planting ditch, they can cause the cucumber to burn and die.
Avoid colonization too deep. Cucumber grafting is for disease resistance. If the planting seedlings are too deep, cucumber will give birth to regenerative roots and lose the grafting effect, which will not achieve the purpose of grafting.
Avoid rainy and snowy days. People often think that in the rainy, rainy and snowy days, pulling the grasshoppers will reduce the temperature in the greenhouse, so they will not pull the grasshoppers. In fact, this method will be more harmful. The temperature of the grass will only slowly decrease, and the cucumber will not see the sun for a long time, which will cause physiological disorders.
Avoid a lot of nitrogen fertilizer in winter. Because the nitrogen fertilizer encounters water during the dispersion process, the water temperature will be greatly reduced, the ground temperature will be reduced, and the normal growth of cucumber seedlings will be affected.
Avoid applying unfermented organic fertilizer. Organic fertilizers will ferment quickly after being exposed to high temperatures. During the fermentation process, a large amount of ammonia gas will be produced. The light ones will decompose the nitrogen fertilizer in the greenhouse, and the heavy ones will cause all cucumber seedlings in the greenhouse to die.
Avoid spraying medicine at noon and evening. At noon, the temperature in the spray greenhouse is too high, the leaf moisture transpiration is fast, and the drug is dried before it is absorbed, especially the manganese and zinc drugs, which will cause medical harm. In the evening, the spray is exactly the opposite of noon. Because it is not completely absorbed by the cucumber leaves after spraying, it will break down due to moisture and fail to achieve the purpose of treatment, but it will aggravate the disease.
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