First, when the weather is cloudy, the indoor temperature is low and the temperature is low, the ground temperature is low, and the vegetable seedlings are weak. In this case, greenhouse cucumber seedlings with poor heat retention are highly susceptible to freezing damage.
2. When planting cucumber seedlings, if the application of quick-acting chemical fertilizers in the base fertilizer is too high, the concentration of chemical fertilizer in the soil will be high, which will damage the root tip and reduce the ability of the roots to absorb water and inorganic salts.
Third, when the weather turns fine, the grasshoppers are suddenly uncovered, the temperature in the shed is relatively low, and the area coefficient of cucumber leaves is large, which will cause the temperature to rise rapidly, and the transpiration of the leaves will increase, causing the physiological loss of water and wilting.
Fourth, flood irrigation can also lead to plant wilting. After irrigation, the soil moisture content is too high, and the gas permeability is poor. Under the condition of anoxic conditions, toxic substances are produced in the soil, causing root poisoning or hypoxia to suffocate and causing the cucumber to wilting.
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