Greenhouse cucumber breeding seedlings

Seedling management after seeding (seeding→ sub-leaf micro exhibition) management is mainly "promote", generally do not remove membrane ventilation, bed soil moisture, bed temperature control at 23 °C ~ 25 °C; broken heart period (Cotyledon micro exhibition → first A real-leaf lobe) is converted to an appropriate "control" management, the daytime bed temperature is controlled at 16 °C ~ 18 °C, night 12 °C ~ 14 °C, control watering, sunny weather as much as possible see the sun.
The false value of false planting is also known as seedling, which is about 10 days after sowing. When the seedlings reach the false value of two cotyledons, the planting density is about 8 to 10 centimeters. The sham is planted in the nutrition bowl and the diameter of the seedling bowl is 10 centimeters. The day before planting wet the seedbed; take the seedlings, do not injure the tender stems, and carefully protect the cotyledons; plow the roots and neck, and speed the root water.
After the management of artificial seedlings, the management of seedlings (seedlings and new roots) has management measures: a boring shed; the temperature of the bed is maintained at 18°C ​​to 20°C; the surface of the bed soil remains moist, but it is strictly prohibited from getting wet. The period of vigorous growth (post-warm→post-challenge) is converted to measures: the bed temperature is reduced to 16°C to 18°C, and is not lower than 12°C at night; under the premise of being free from freezing, see as much ventilation as possible. Timely and appropriate amount of topdressing and ensure water supply; After the seedlings are replenished and at the time of 3 to 4 leaf stages, topdressing can be performed once, and urea can be used with a concentration of 0.1% to 0.2%; the water management keeps the soil surface semi-dry and semi-wet. 2 to 4 leaf stage: spray 150 ~ 200 mg / l concentration of ethephon to increase the female flower rate (limit the female flower rate of the lower species), when the top soil consolidation in time loose soil. Seedling hardening period: 4 to 5 days before planting, the seedlings are to be cultivated, and measures such as gradual cooling, control of watering, and increased ventilation are mainly adopted.

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