1. Delayed nursery and colonization
The cucumber seedlings bred under low temperature conditions are mostly female flowers in the early stage and little or no male flowers, so the pollination rate is very low. To make the proportion of male and female flowers appropriate and improve the pollination rate after planting, cucumbers should be sown 20 to 25 days later than the fruit picking. The seedling age should be controlled within 40 days, and the planting period should be delayed by 15 to 20 days. It is also necessary to appropriately raise the temperature of the seedlings and promote the formation of a certain number of male flowers. This article uses three secrets of cucumber seedlings to ensure the source of pollen.
2. Increase phosphate fertilizer and control row spacing
In order to make the seed particles full, in addition to the application of high-quality organic fertilizer, per acre with superphosphate or calcium magnesium phosphate 20 kg. In the later stage of pollination, two consecutive phosphate fertilizers should be applied in succession. The interval between two treatments should be 12 days.
Only 2 or 3 melons per plant are needed, so there aren't too many leaves and tall plants. At the time of cultivation, about 4,800 seedlings per mu were maintained. The 100 cm wide pods were planted in two rows with a spacing of 30 cm.
3. Artificial pollination
The pollination of female flowers and guayui should be strictly selected, and they should meet the characteristics of varieties, be free of disease, no deformity, and no pollution, and they must be eliminated as soon as possible. Artificial pollination time is generally from 8 to 10 am. Select male flowers that are sufficiently open to remove the petals and expose the stamens in the middle. Then select the pollinating female flowers and gently wipe the stamens on the stigma of the female stigma, so that the male pollen is scattered on the stigma of the female flowers. China Agricultural Net: Take care not to use too much force to avoid scratching the stigma, but also pay attention to leave the identification mark of pollination, so as to avoid re-grant or leakage. In general, only 3 female flowers are selected for pollination per plant.
4. Field management
1 temperature control. The appropriate temperature is the key to guaranteeing the pollination and fruitfulness of the cucumber seedlings. During the pollination, the temperature in the shed is maintained at 25-28°C during the day (the pollen vigor is stronger at this temperature, and the pollination and seeding rate is the highest), and it is 18-20°C at night. Before and after pollination, the temperature of the shed should be appropriately increased, kept at 28 to 30°C during the day and 18 to 20°C at night.
2 plant adjustments. Keep 15 leaves in time. The flowers and melons above the melons must all be removed early. After the fruit is set, the fertilizer and water management must be strengthened.
5. Disease prevention and control
Adhere to the principle of prevention, use 25% metalaxyl WP 1000 to 2000 times, or 40% triethylphosphonate wettable powder to prevent viral diseases, but also pay attention to the prevention of keratopathies and anthrax .
6. Seed collection
35-40 days after pollination, when the melon skin is dark yellow and cracked, it can be harvested. The melons were picked and placed in a room at about 25°C for 1 week. Then the seeds and melons were cut open. The seeds were rinsed with water, dried for 3 days, dried, and then kept in the shade for 5 days, and then bagged. Storage.
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