Green pollution-free cultivation techniques of greenhouse cucumber in early spring
Variety selection
It is advisable to produce cucumbers in greenhouses in early spring in order to select low temperature resistant Jinchun No. 4, Changchun Micole, and Xintai M. punctatus. The cucumber species of the puncture cucumber are suitable for early cultivation in spring greenhouses.
Bed soil preparation
Prepare nutritious soil before sowing. The nutrient soil can be selected from 6 fields of datian soil (preferably diced garlic or peat soil), 3 parts of mature organic fertilizer, 1 part of mature horse dung, and proper amount of superphosphate and diammonium phosphate in the nutritious soil. Disinfection must be done after the nutrients are well-matched. The commonly used seedlings in the production of mixed soil, 50-80 grams per cubic meter of the amount of full mixing, can prevent seedling stage damping-off, blight and so on. Cucumber roots have a weak ability to regenerate. Plastic quail seedlings should be used. The prepared nutrient soil should be stacked in the warm place for 7-10 days. The nutrient soil should be 1-1.5 cm away from the rind, and the nutrition pods should be preliminarily laid to cover 1-2 layers. The mulching film is used to raise the ground temperature. If the ground temperature is too low, the heating wire can be used for heating.
Immersion germination
The well-selected full cucumber seeds are placed in warm water of 55°C, soaked in warm water and soaked until the water temperature is about 30°C, and soaked for 6-8 hours. At this time, the seeds absorb enough water, and then the seeds are drained and the water is taken out. 28-30 °C under the conditions of germination, germination process should be flipped 2-3 times, so that heat evenly, increase the amount of oxygen permeability, to prevent mildew, the seeds exposed when it is placed at -1 °C low temperature 12-24 hours, To improve the cold resistance of seedlings, after the seeds germinate, select sunny sowing.
Sowing techniques
Cucumber seeding requires 5 cm deep ground temperature not less than 15 °C, or budding slow and uneven, prone to rotten seed phenomenon, soaking the bottom water at the time of sowing, each nutrient pods - seed buds, the seed bud end down In the nutritious soil, cover the sterilized nutrient soil 1.5 cm thick and then cover the plastic film to keep warm.
Cultivate strong seedlings
Before the emergence of the temperature maintained at 28-32 °C, 17-20 °C at night, timely removal of the film after emergence, the daytime fell to 22-25 °C, night fell to 15-17 °C. Seedling temperature is maintained at 20-23°C as much as possible, with proper ventilation, lowering temperature and humidity. After the first true leaf is unfolded, the seedlings are bred in large greenhouses. The temperature difference between day and night is maintained at 5-8°C. In case of rainy weather, incandescent lamps should be used. Or the fluorescent light fills the light, the temperature in the spring is low, and there are more female flowers in the cucumber, so no need to use ethylene to increase female flowers. Colonization was conducted 7-10 days prior to planting. The temperature was 23-25°C during the day and 10-13°C during the night. It was adapted to the outside temperature. One spray of 75% chlorothalonil was sprayed 1 day before colonization and the seedling age was 25 days.
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