Seven taboos for planting cucumbers in greenhouse

one。 Do not change the light angle of the greenhouse at will. The angle of the solar greenhouse planting cucumbers has been scientifically demonstrated for a long time, and its north-south span, height and back slope angle should not be changed at will.

two。 It is forbidden to concentrate on all kinds of chemical fertilizers, especially nitrogen fertilizer, when it is moist and hot, it will produce a lot of harmful gases, such as concentrated application in the planting ditch, it can lead to cucumber root burning and dead seedlings.

three。 Avoid planting too deep, we all know that cucumber grafting is for disease resistance, such as planting seedlings too deep, cucumbers will regenerate roots, lose the role of grafting, can not achieve the purpose of grafting.

four。 Do not pull grass in overcast, rainy and snowy days. People often think that when pulling grass in overcast, rainy and snowy days, the temperature in the greenhouse will drop, so do not pull grass. In fact, this practice will do more harm, the temperature will only slowly drop, but also because the cucumber can not see the sun for a long time, resulting in physiological disorders.

five。 It is forbidden to apply a large amount of nitrogen fertilizer in winter because after the nitrogen fertilizer is dispersed in the process of water, it will greatly decrease the water temperature, reduce the ground temperature and affect the normal growth of cucumber seedlings. six。 Do not apply immature organic fertilizer will ferment quickly after high temperature, a large amount of ammonia will be produced in the process of fermentation, light decomposition of nitrogen fertilizer in the greenhouse, heavy can make all cucumber seedlings die in the greenhouse. seven。 Avoid spraying at noon in the evening, the temperature in the greenhouse is too high, the leaf water transpiration is fast, and the medicine is dried before it is absorbed, especially manganese and zinc drugs, which will cause drug damage. Spraying in the evening is just the opposite of noon, because it is not completely absorbed by cucumber leaves after spraying, it will decompose and fail due to moisture, which can not achieve the purpose of treatment, but aggravate the occurrence of the disease. Liu Shujun