Causes and preventive measures of acute seedling death of cucumber in greenhouse

In the process of off-season cultivation of cucumbers in greenhouse, there are often cucumbers that grow well some time ago, and suddenly there is the phenomenon of acute seedling death, which occurs very quickly, often without timely prevention and control, the phenomenon of large-scale seedling death has occurred. So how to prevent the acute death of cucumber seedlings in greenhouse? Come and have a look with the editor.

1. Causes of acute seedling death

There are many reasons for the acute death of cucumber seedlings in the greenhouse, which are triggered from many aspects, such as weather reasons, continuous rainy and snowy days or sudden sunny days after rain, and excessive temperature difference causes rapid death of seedlings; cucumbers enter the flowering and fruiting period, sunny days and high temperatures, if the air volume is large at this time, the transpiration of leaves is large, some of the plants with poor rooting begin to atrophy, and serious water loss will cause the whole plant to wither. Chilling injury or freezing injury will cause partial damage to the film surface of the greenhouse, and cold wind will cause wilting and death of seedlings; in addition, the concentration of fertilizer is too high, especially when chemical fertilizer is applied near the root base, it is very easy to burn roots and die seedlings.

II. Preventive measures

1. Appropriate watering

The root system of cucumber is more developed, but it is more concentrated on the surface of the soil to produce new roots. in order to avoid inhibiting the root population due to watering errors, it is necessary to irrigate less planting water and return seedling water as appropriate. When the temperature is low, the soil moisture is high, or in case of continuous overcast and rainy days, you can water less or not to return the seedlings. After the cucumber enters the peak period of melon bearing, it should be combined with fertilization and watering, and it is appropriate to apply it every 10 days to strictly prevent thick fertilizer from injuring the root. Watering should be in the sunny morning, remember to water in the afternoon or evening, at the same time in the shed rainy days should not flood irrigation, to do the size of water frequently.

2. Reasonable control of humidity

The initial stage of planting is generally not ventilated, keep the humidity in the shed between 25-30 degrees during the day and 12-15 degrees at night, not less than 10 degrees. With the growth of melon seedlings, it is necessary to adjust the air and control the temperature in time, ventilate when the daytime temperature rises to 30 degrees, close the shed when it falls to 28 degrees in the afternoon, and the temperature is not lower than 12 degrees in the melon period.

3. Comb frequently

Cucumber cultivation in the shed should pay attention to the surrounding ditches to ensure loose and smooth drainage and irrigation, convenient and smooth drainage, check whether the greenhouse film is damaged and leaky cover every day, and pay attention to repair so as to keep warm and warm.

The above greenhouse cucumber acute seedling death causes and preventive measures, hope to help you, want to know more related knowledge, please pay attention to us.