Cultivation techniques of Japanese scallions

Japanese shallot is an excellent variety with high cold resistance selected from Japanese scallions by Heze Special excellent Melon and vegetable Research Institute of Shandong Province. This variety has the characteristics of short leaves, heavy wax powder, long and compact spring onions, early maturity, high cold resistance and fast growth. Generally, the Beginning of Autumn raises seedlings within 10 days, cultivated in October, listed in spring, and does not need protection in winter.

Raising seedlings: the suitable time for raising seedlings is from July 20 to August 20. Nursery bed to choose high-lying and dry, not easy to accumulate water fertile sandy soil, land preparation, border width of 1.5-2.0 meters, unlimited length. The seedbed applies 50kg high-quality compound fertilizer per mu. After fine raking and fine raking, it is watered to make soil moisture. After the water seeps, spread the seed mixed with soil evenly on the border, then spread evenly with 5% phoxim granule mixed with fine soil, and then cover the fine soil with 2 to 3 cm, which can be covered with grass to protect against sun and rain. Each plant of 667 square meters of Japanese scallions requires 500 grams of seeds and 150 square meters of seedbed.

Planting: from October 10 to November 10, soil preparation and fertilization should be made in time after the previous crop was harvested. Generally, 3000 kg of high-quality organic fertilizer, 50 kg of ternary compound fertilizer, 25 to 30 kg of urea and 25 to 30 kg of potash fertilizer are applied to the bottom of the plough. After leveling, the border is made from east to west, with a width of 30 cm and a height of 25 cm. When planting, pull out the onion seedlings, hang them for a while, insert the seedlings under the film with a bamboo stick, the row spacing is 18 cm, the plant spacing is 8-12 cm, and plant about 15000 plants per mu, then straighten up and water the seedlings slowly.

Winter and spring management: after the beginning of winter, pour frozen water before the cold spell comes. After Greater Cold, the Beginning of Spring will arrive, and the temperature in the north will gradually rise, so it is necessary to water and fertilize in time. If the temperature is low in the early stage, small water can be irrigated according to soil moisture to prevent flooding. After the sting, all the land was thawed, combined with watering, and 30 kg of urea was applied per mu. In order to harvest ahead of time, farmers with conditions can build a small arch shed in front of the Beginning of Spring, so that the temperature is about 20 ℃ and more than 30 ℃, then they should be ventilated in the morning. After the temperature warms up, the growth rate of onion seedlings is accelerated, and it is easy to bolt and bud at this time. After budding, the buds will be removed in time, so as to transform green onions from reproductive growth to vegetative growth so as not to reduce the quality of green onions.

This variety can also raise seedlings from September 20 to October 10, and it can be cultivated and managed the same as other Welsh onion varieties, and the yield per mu can reach more than 7000 kg.