How to cultivate yellow garlic in a greenhouse, what are the techniques for cultivating garlic yellow in a greenhouse?.
?1. The garlic bulbs that have been treated at low temperature should be sown immediately because they have passed the vernalization stage to prevent the garlic seedlings from aging. The low-temperature-treated seed bulbs should be soaked in clean water for 6 hours before sowing. The source of garlic bulbs contains only 67.6% water. After soaking, the water will be fully absorbed, which is beneficial to germination and leaf development. Soaked garlic bulbs should be sown in time, otherwise they will rot. If seeds are sown directly without soaking, the sand tray must be kept sufficiently moist to allow the bulbs to absorb water. Pick up the soaked seed bulbs and break them into cloves. Break the large bulbs into garlic cloves from the outside to the inside according to their structure. Pay special attention when breaking off the garlic cloves. Do not remove the valves to avoid damaging the garlic cloves and causing rot.
2. Seed selection and soaking
The growth of garlic depends entirely on the nutrients stored in garlic cloves. The yield of garlic is directly related to the quality of garlic seeds. Garlic seeds require large and uniform cloves, and the garlic cloves are plump and substantial. This will make the garlic pseudostems thick, tall, and tender in quality. Generally, about 10 cloves of white-skinned garlic and purple-skinned garlic per head can be used to produce garlic yellow. Pay attention to choosing garlic seeds that are free from freezing damage, bruises, and yellowing and withering. Soak the garlic seeds in clean water for 18 to 24 hours, take them out, remove the stem tray, and sow them in time. If you do not soak the seeds, sow them directly. The bed soil must be kept fully moist.
3. Arrange the garlic cloves
Arrange the garlic cloves one by one in the bed, sow 15 to 18 kilograms of garlic per square meter, flatten them with a wooden board, and cover the garlic cloves with fine seeds. Add 3 to 5 centimeters of sand and water and cover the bed with plastic film.
4. Temperature and humidity management
Before the garlic seedlings are unearthed, the day temperature in the shed is 25°C and the night temperature is 18°C ??to 20°C; from the time the garlic seedlings are unearthed to the height of 27 cm, the daytime temperature in the shed is The temperature is 18°C ??to 20°C, and the night temperature is 14°C to 18°C; when the seedling height is 27 to 33 cm, the day temperature in the shed is 14°C to 16°C, and the night temperature is 12°C to 14°C; 4 to 5 days before harvest, the greenhouse The daytime temperature is 12°C to 15°C, and the night temperature is 10°C to 14°C. Immediately after planting the seeds, water them once and fill the exposed areas with sand.
5. Harvest management
18 to 20 days after sowing, harvest when the seedlings are 30 to 40 cm tall. The yield of Toudao garlic yellow can reach 70% of the sowing amount, and 1 kilogram of garlic seed can harvest about 0.7 kilograms of garlic yellow. From now on, the second cut can be done about 25 days later, and the third cut can be done about 30 days later. Sprinkle water the next day after each harvest, with 1 to 1.25 kilograms of water per square meter. After sprinkling water, lightly sprinkle some fine sand to promote wound healing. After harvesting 2 to 3 pieces of garlic, remove the mother garlic and sandy soil and replace it with new sandy soil to continue production.
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