One, pre-stamp management
1. Clean the bowl. After a few frosts of leeks, nutrients have entered the bulbs and the leaves begin to wither. In this case, the stalks, dead leaves, and weeds should be cleaned up to reduce the latent pathogens and reduce the incidence.
2. Piers. After the Qing Dynasty, the topsoil above the bulbs of the piers were dug out of the alfalfa, exposing the bulbs to sunlight and freezing overnight. This would break the dormancy earlier, make the cocoon neat, and also eliminate the pests that invaded the alfalfa pier through the winter. Be careful not to hurt the roots while you are crouching.
3. Irrigation roots. After 6 to 8 days, 50% phoxim EC may be used per acre for 1000 times or 80% crystal dipterex 500 times to prevent root damage.
4. Timely top dressing. After irrigating for 3 to 4 days, it is possible to fertilize between the rows. Generally, 2000-3000 kg of high-quality organic fertilizer per mu and 250-300 kg of cake fertilizer are applied. After the application, the cover soil is leveled with the smashing pier and then watered until the soil is covered. After sinking, cover again with fine soil to bury the pier.
Second, after the shed management
1. Temperature management. After the leeches are shed, they usually emerge in about 25 days. After emergence, the temperature in the shed is controlled between 20°C and 25°C during the day and should be kept warm at night.
2. Appropriate soil. When the seedlings grow to 6 to 7 centimeters in height, the soil is first cultivated and the soil thickness is 3 to 4 centimeters. When the seedling grows to a height of 10-15 cm, the second earth-cultivation is performed. The thickness of the soil is 6-7 cm, and the earth is cultivated for 2 or 3 times to turn the root of the leeks into a mound, and the rows become ditch.
3. Fertilizer management. Cutting knife is not watering before the leek, until the second knife leek grows to 6 cm high, combined with watering, per acre chase compound fertilizer 20 to 30 kg, 4 to 5 days before harvest and then watering. After each cut, the ridges should be ridged and the bulbs should be aired. After the new leaves are grown, they can be topdressed with water and soil.
4. Harvest in time. When the height of leeks grows to 20-25cm, generally before and after New Year's Day, the first knife can be harvested. The best time to harvest is on sunny days, harvesting from the base of leek. After each interval of 20 to 25 days harvest time, the second knife harvest time around the Spring Festival, the general harvest 3 to 4 knives, mu yield of about 3,000 kilograms.
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