Greenhouse leeks early spring management
2018-10-12 16:03:03
Temperature management leeks hi cold, growth temperature is 15 °C ~ 24 °C, every day should be appropriate release. In order to promote the budding, the room temperature should be maintained at 18 °C ~ 25 °C during the day after the lock shed, and the room temperature should be controlled at 17 °C ~ 23 °C during the day after germination. The first knife before the harvest of leek temperature 15 °C ~ 22 °C, night room temperature 10 °C ~ 12 °C. After each cut, the temperature can be increased by 2 °C ~ 3 °C, but can not exceed 30 °C. Fertilizer management Leek growth requires lower air humidity and higher soil moisture. The greenhouse air humidity is maintained at 60% to 70%, and the absolute soil moisture content is maintained at 13% to 15%. Generally sticky soil soil before the shed is no longer watered. In order to promote the growth of the next sword, we can pour water once every 5 to 7 days before the harvesting of the first knife. Apply 15 to 20 kilograms of ammonium nitrate per 667 square meters to open water and increase the water supply. Afterwards, 5 to 7 days before the harvest of each kimchi. Watering fertilizers must be added. The foliar fertilizer is sprayed with potassium dihydrogen phosphate once every 7 days in a growing period, using a concentration of 300 times; and gibberellin can also be used, with a concentration of about 40,000 times. When it is sprayed when it grows to 15 centimeters, 1 g per 667 square meters, 50 kilograms of water, and then 0.5% ammonium nitrate is better. It is more appropriate to cut the cut and yellow, and the distance between the two swords is 35 days.
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