Onion cultivation and cultivation techniques

First, sowing scallion seed small, testa thick, cotyledons unearthed, seedling growth is relatively slow, long seedling period. In order to shorten the time of land occupation, it is easy to manage and transplant seedlings. The seedbed is not reusable. After harvesting, the fertilizer is deep-turned and fertilized. Usually, it is made into a sorghum with a width of 1.4 meters. The seedbed should be finely sorted and soaked on the bed surface before sowing. The seeds should be sown with new seeds. The amount of seed per acre of field should be 75-100 g. After sowing, cover soil 2 cm, and then cover the straw or film to moisturize and accelerate seedling.

Second, seedling management generally broadcast 6-8 days after the seedlings are released at the same time. At the seedling stage, the plant growth was less and the leaf transpiration was less. After emergence to the three-leaf stage, it is necessary to control the fertilizer and water so that the root system develops robustly. Seedling period between the seedlings 1-2 times, remove too dense weak seedlings, seedlings 7-10 cm, and remove weeds.

Third, colonization scallion colonization is generally (in early June) to Xiaoshu (in early July) period. When the green onion grows 30-40 cm in height and 1-1.5 cm in diameter, it is suitable for transplantation. 1 to 2 seedlings permeate water before transplanting, and seedlings should be selected and graded when they are raised. The dead leaves were removed and the diseased wounds and shoots were removed. The thick, non-bifurcated seedlings were selected and planted according to the size of the seedlings. The planting density was generally 100-120 cm and the plant spacing was 2.5-3 cm. The number of seedlings is 22,000. The depth of planting is appropriate for exposure.

IV. Field Management After entering the summer season after planting, the physiological function of the aerial parts and the root system weakened and the growth was slow. At this point, if it is not over drought, it should not be watered. Drain the water after the rain so as not to cause rot, yellow leaves and dead seedlings. Many times of cultivating, loosening, and weeding should be used to promote root development. In the autumn, the onion leaves and scallions are in full bloom. Watering, topdressing, and earth-cultivation must be promptly performed to promote the rapid growth of light blues. When watering should be done, we must always keep the onion field moist and stop watering for 1 week before harvest. For light green growth and softening, 8-9 months to topdressing and soil cultivation 3-4 times. Topdressing is mainly nitrogenous fertilizer, and superphosphate and wood ash are appropriately added, and they are usually applied every 15 days or so. Urea urea 10-15 kg per application, superphosphate 15 kg. The soil should be dried after dew in the morning, but it should be done when the soil is cool, and once every other month in February. In the end, it was cultivated into high ridges. Each time the soil was cultivated, it was a leaf that did not bury onions.

V. Harvest Onion harvesting, the use of four teeth or shovel will be digging onions on one side of the ridge, exposing light blue, hand pull to pull out the onion strains. When harvesting, avoid vigorously pulling tug, to avoid damaging pseudo-stem, pull off the stem disk or cut root, and reduce the quality of commercial onion. The scallions should be shaken after the harvest, soil, spread in the ground, every two ditch onion and into a row, in the ground to dry for 2-3 days. When the leaves are soft, when the fibrous roots and semi-dry surface are half dry, remove the dead leaves and tie the rods, each containing 7 to 10 kg. Do not stack them in order to prevent heat rot. Scallions should also avoid the frost in the morning when harvesting, and should wait until the temperature rises during the day.