New technology
First, the bed. Choose free rooms or greenhouses. A layer of fine sand was laid on the ground first, with a thickness of about 15 centimeters. It was flattened with a wooden board. The sand bed was bordered by brick and was 20 centimeters high. Second, planting. The leeks that were cultivated in early spring were selected as a kind of leeks and were picked up on the land before being frozen. The dried old leaves were cut off, the fibrous roots were cut, and the rhizomes were left and planted closely on the sand bed and filled with clean sand. Voids (do not bury pseudostems), after planting, drench the sand bed with water. Third, management. Within one week after planting, seedlings could not be watered, and the room temperature was kept at about 20°C. During this time, close the doors and windows as much as possible to reduce the evaporation of water and maintain the temperature of the air and sand bed. If the temperature is too high, open the doors and windows and pour water as appropriate. After the new roots were introduced, they began to be poured with nutrient solution and water, and the ratio of watering and feeding the nutrient solution was 2:1. The nutrient solution is made up of urea, potassium dihydrogen phosphate and water in a ratio of 1:1.5:1000. Fourth, harvest. When the temperature, fertilizer and water are suitable, it can be harvested every 20 days. Seeds grown in winter can be harvested 3 or 4 times in the spring of the second year. China Agricultural Network Editor