First, temperature management. Leek hi cool, growth temperature is suitable for 15-24 degrees during the day should be appropriate release. In order to promote the budding, the room temperature should be kept at 18-25 degrees during the day after the shelter, and the room temperature should be controlled at 17-23 degrees during the day after budding. The day before the harvest, the first knife must have a temperature of 15 to 22 degrees and a night temperature of 10 to 12 degrees. Each subsequent cut can increase the temperature by 2 to 3 degrees but must not exceed 30 degrees.
Second, fertilizer and water management. Leek growth requires lower air humidity and higher soil moisture. The greenhouse air humidity is maintained at 60-70% and the absolute moisture content of the soil is maintained at 13-15%. Generally sticky soil soil before the shed is no longer watered. In order to promote the growth of the next knife, a small amount of water can be poured 5 to 7 days before the first knife is harvested. 15 to 20 kg of ammonium nitrate can be used to increase the water use per 667 square meters (mu). After the harvest, each vegetable must be harvested. 7 days, add water and fertilizer.
Third, foliar fertilizer. During the growing period, potassium dihydrogen phosphate was sprayed once every 7 days, using a concentration of 300 times; gibberellin was also used, and the concentration was 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 0.5% ammonium nitrate are more effective. Fourth, harvest. The harvesting period is generally on New Year's Day or before the Spring Festival. It is more appropriate to cut the mouth in yellow, and the distance between the two swords is 35 days.
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