Management Technology of Cucumber Fruiting Period in Facilities
1. Temperature management
Open the grass curtain as early as possible on sunny days, clean the roof, and see more light.
The temperature is managed according to the four-stage variable temperature index. In the morning, photosynthesis is the strongest, and the temperature is controlled at 25 ° C to 33 ° C. In the afternoon, the light is weakened and connected with the night temperature. The temperature is controlled at 25 ° C to 20 ° C, which can inhibit breathing consumption. To promote nutrient transportation in the first half of the night, the temperature should be controlled at 20 ℃ to 15 ℃, and it is best to maintain the temperature at 18-20 ℃ within 4 hours after sunset. In the second half of the night, breathing should be suppressed to reduce nutrient consumption, and the temperature should be controlled at 15 ℃ to 10 ℃. During the growth period of cucumber, if the temperature exceeds 35 ℃ or below 10 ℃ for a long time, the growth of cucumber will be affected. The average temperature difference between day and night should be maintained at 10 ℃ -13 ℃. In the case of continuous cloudy days when the light is weak, the use of lower temperature management is higher than that of high temperature management.
2. Water and fertilizer management
When the root melon is 8 to 10 cm long, top dressing and irrigation will be started. Apply 15 kg of diammonium phosphate and 15 kg of potassium sulfate per mu. After 20 days, the second top dressing irrigation.
After the cucumber enters the peak season, topdressing and irrigation should be carried out in time, and irrigation should be carried out alternately in the dark ditch and the open ditch. Fertilization should adhere to the principle of eating less and eating more meals.
3. Plant adjustment
Hanging vines, tangling vines, and falling vines should be performed in the afternoon to prevent breaking the stems. In the afternoon, the water content of the stem vine is reduced, the flexibility is enhanced, and it is not easy to damage the stem vine. Drop the vines and entangle the vines in time to keep the functional leaves in the best space position of the sunlight greenhouse for photosynthesis. When the vine does not reach the standard of falling vine, the individual high vine can be adjusted and lowered appropriately to make the growth point neat and consistent.
4. Reasonably fall
When the cucumber vines are more than 2 meters tall, first remove the old leaves and diseased leaves, and then drop the vine seedlings. Remove 3-4 old leaves each time, drop 30 to 40 cm at a time, drop them with hanging vine rope Lap, just one round twice. The height of the plant is controlled from 1.7 to 2.1 meters, the functional leaves are maintained at 15 to 20, and the lower leaves are 13 cm from the ground.
5. Appropriate thinning
Large fruit cucumbers leave an average of 2 to 2.5 knots for a commercial melon, small fruit cucumbers an average of 1 to 1.5 a melon for a commercial melon, deformed melons and too many female flowers, young melons are sparsely removed early to reduce ineffective consumption of nutrients. For plants with strong stems and leaves, the melon strips should be harvested properly late; the melon strips with weak growth potential and weak stem plants should be harvested early.
6. Prevention and treatment of diseases
The control of cucumber downy mildew mainly depends on ventilation, which can be ventilated under the curtain at night. After the occurrence of the disease, the leaves can be sprayed with 72.2% Plec 800 times solution or 72% Gram dew 600 times solution or 53% Jinlei 500 times solution or 22.5% Silver Farley (Fluobacterium cyprocarb) 600 times solution Carry out prevention. Alternate and rotate medication.
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