During the cultivation season, green onions have a wide adaptability to temperature, seedlings can be wintered, summers are not dormant, and products can be harvested at any time, regardless of size, so they can be sowed and sold on an annual basis. However, winterize green onions need to be cultivated under certain weather conditions in order to form Stout high quality light blue. Scallion cultivation season is relatively strict, generally autumn sowing, winter harvest in late summer. It can also be broadcast in spring or in autumn. Spring can be harvested in winter when it is harvested, but the yield is low.
In order to prevent pests and diseases and the lack of certain nutrients, the scallops should not be contiguous with wild onions, regardless of nursery or transplanting sites, and should be rotated with onions and garlic for more than three years. Scallions can be rotated with melons, Beans, leafy vegetables or food crops. Onion shade, can intercropping with other vegetable crops, such as green onion can be used to plant early peas, early cabbage, indigo, etc., eggplant rows can be set onion, and with tomatoes, melon and other intercropping.
Land preparation Fertilization scallion seedlings have a longer period, generally transplanting seedlings, nursery beds should be selected loose soil, organic matter is rich, flat terrain, convenient irrigation of sandy loam, per acre uniformly spread rotten farmyard fertilizer 3000-4000 kg. 25 kg of superphosphate can be applied per acre for phosphorus deficiency plots. Afterwards, the crop was ploughed off, the oysters flattened, and the poison valley was used to control the underground pests.
Planting time: Scallions are mainly planted in autumn. The sowing time is preferably from mid-September to early October. Early in cold regions, the seedlings can grow 40-50 days before winter and grow into 2-3 leaves. Plant height About 10 cm, 4 mm in diameter is appropriate. In this way, seedlings of physiological seedling age can safely pass through the winter to avoid or reduce early convulsions in the following year; green onions can also be sown in spring, but the yield is low.
Seed treatment before seed treatment can increase germination rate and emergence rate, and prevent diseases. Soak the seeds in clean water and stir for 10 minutes. Remove the seeds. Place the seeds in hot water at 65°C for 20-30 minutes and stir continuously. Or soak for 20-30 minutes with 0.2% potassium permanganate solution and then apply clean water. Rinsing can kill bacteria attached to the surface of the seed. Seeds can be unearthed 1-2 days before soaking. New seeds should be used in the same year, sowing rate of 3-4 kg per 667 square meters, can be planted 0.5-0.68 hectares;
Seeding methods sowing methods are divided into sowing and drilling two.
Spreading is to sow a layer of soil in the sowing pot to screen and cover the soil. Sowing tiller is first used to fill the bottom of the water, and the subsurface soil is soaked under the water. After uniform sowing, the fine earth is 0.8-1 cm thick. The wet sowing method is also called: first sowing, covering the soil, stepping on the solid, and watering, which is called dry broadcasting method. .
Drilling can also be performed in thousands of sowing and wet sowing. The sowing method is to sow the seedlings to open the ditch first, and the ditch is 15 centimeters deep and 1.5-2 centimeters deep. The seeds are sown in the ditch, and the building is flattened, solid and watered. The wet sowing method is to pour the water into the ground first, and put the soil on the ground, and then dry it slightly, and then flatten, ditch, sow, and cover the soil. The advantage is that the soil at the end of the foot is full, the topsoil is not compacted, and the seedlings are neat and tidy, but the technology is higher.
After the cultivating management of small seedlings is completed, the grass should be ploughed and the seedlings should grow vigorously. Seedlings grow during the pre-winter period, the temperature is getting lower and the growth is slow. At this point, water and fertilizer should be controlled to prevent the seedlings from growing too long or being leggy. Before winter can be poured 1-2 water. After the emergence of seedlings, pour a small amount of water and pour over the winter water before the soil is frozen. Watering should be based on the soil moisture, such as the soil is not dry or not watered. After pouring frozen water, the thin layer of fine horse dung, earth miscellaneous fertilizer or grass ash may be spread in a thin layer of 1-2 cm thick in order to facilitate cold protection and the seedlings can safely pass winter. The normal standard before onion seedlings is over the winter, the average plant height is about 10 centimeters, there are 2 true leaves 1 heart and leaves, the seedling bulb base diameter is less than 0.3 centimeters, Miao strong and prosperous. If the seedlings are too large, the phenomenon of convulsion in the first year of the year is serious. If the seedlings are too small, it will be easily frozen to death.
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