How to grow green onions? The onion is rich in various nutrients such as carotene and vitamin B. The leaves are cylindrical cyan, and the green onions are also a common vegetable on the table. Today, let's learn how to grow green onions, why should we ditch and cultivate soil? How to grow green onions to produce high yields? First, the green onion seedlings Sowing time All green onions can be sown in all seasons, depending on the variety. The best sowing time for high-yield cultivation of green onions is in autumn, that is, autumn sowing, generally in early October, the temperature is stable at 16.5 degrees Celsius to 17 degrees Celsius. The climatic conditions in the north and south of China are different, so the sowing time is also different. How to determine the optimal sowing time can be determined according to the size of the seedlings before wintering. 2. Finishing the seedbed The green onion planting plot should be close to the water source and well drained. The land is required to be fertile and flat. Before the whole process, the nursery field should be shallowly ploughed, that is, we often say that it can be squatted. Apply 50 kg of compound fertilizer per mu as base fertilizer, and also apply 0.5 kg of carbendazim powder and 2.5 kg of skin mulberry. This is to prevent germs and underground pests. 3. Sowing Before planting, remove the cover soil from the crucible, and then fill the water in the crucible (the irrigation volume must be large). After the water has been infiltrated, mix the seeds with sand, sprinkle it twice in the crucible (sprinkle evenly), and finally cover the soil. The thickness of the soil is 1.5 cm - 2 cm, the cover soil should be even, the seedlings for the nursery field should be 1.3 kg, and 3-5 mu of green onions can be transplanted. The next morning, the next day, the shovel is used for shallow hoeing. Once again, prevent uneven cover. Second, seedling management 1. After 7 days of autumn sowing, the seedlings will be planted in spring for 8-12 days. The cotyledons will not be straightened before the watering is controlled, so as to avoid the siltation of the board. During the rain, the floor can be cut with light iron and light. When pouring the first water, wait until the cotyledons are straight. Weeding (we can not use herbicides), the seedlings grow to about 2 cm, about to straighten, should be used in time to prevent fungal diseases, usually sprayed every 5 days (mainly used to treat dead root rotten vaccine, virus and gray mold Disease medicine), after the seedling grows to more than 5 cm, according to the ground force, urea can be used to raise the seedlings. 2. Before winter, we should focus on cultivating strong seedlings. The standard is 8-10 cm in height. The true leaves reach two leaves and one heart. The leaves are green and strong, and the diameter of the base is no more than 0.3 cm. During the period, according to the humidity of the ground, 1-3 water can be poured, and the frozen water is poured before freezing. The layer of soil is mixed with woody ash or fine-circle fertilizer, and the thickness of the leaf sheath is not obvious. 3. After the autumn seedlings are in the spring, the roots, hearts and leaves of the onion seedlings begin to sprout, and the glutinous rice noodles are removed once again to prevent the seedlings from being pressed, to achieve moisturizing, warming and early growth. In the first ten days of March, it is not easy to prematurely, so as to avoid the low temperature affecting the early growth of onion seedlings, and it can be combined with watering to apply 10 kg of urea per acre. From late March to early April, the seedling height is about 30 cm, and the seedlings are 1-2 times, and the seedlings are kept at a distance of 3-5 cm. From the end of April to the beginning of May, the seedling height is about 50 centimeters. It is the long-term growth of onion seedlings. It is necessary to do a good job in fertilizer and water management. It can be applied in stages, such as urea, diamine, compound fertilizer, etc., as small as two times and as many as three times, each time 10- 15 kg, combined with spraying and applying micro-fertilizer 2-3 times. And timely use of drugs to prevent fungal diseases, pay special attention to the control of onion, onion horses and leaf miners. Stop watering 15 days before transplanting and carry out seedlings for stable growth. Third, transplanting, planting 1. Selecting land and trenching It is best to choose north-south and well-drained plots. At the same time, the soil is fertile and the plot is better. First, the base fertilizer should be applied. The base fertilizer application standard is 5,000 kg per mu, 10 kg of urea and 100 kg of phosphate. Potassium fertilizer is fifteen kilograms, and then it is ploughing and turning the soil. Finally, according to the groove distance of 80cm, the groove depth and the groove width are about 25cm each. Suitable for early planting, generally from mid-June to early July, before the seedlings should be watered once in the first two days, the seedlings should be deep-rooted, or into the handle, shake off the soil, lay flat, eliminate the disabled seedlings and diseases Seedlings are subdivided into three grades according to the size, height and thickness of the seedlings. In the case of seedlings, the third-grade seedlings are generally not used. It is necessary to follow the grading with the seedlings, and transplant them to keep the green onions fresh when transplanted. The transplanting plant spacing is preferably 3-4 cm. 3. Colonization method (1) Dry cultivation method After ditching, the onion seedlings are arranged in sequence on the side of the ditch wall according to a certain plant spacing, and the onion leaves are flat against the ditch wall, and then the earth is used for bucking. It is advisable to bury the soil deep and not to bury the heart. Or use a shovel to plant at a certain distance, and then step on it. After planting, you should pour water with it. It is best not to get rid of it. (2) Hydroponics Put the selected seedlings on the back ridge for one meter and evenly arrange them. The water in the ditch will be watered first. After the underwater seepage, one person will squat on the back of the ridge every 8-10 meters. When cutting, use peeled branches to make a plug, the top is a "v" fork, use the left hand to take the seedlings, the right hand to take the stick, use the fork to hold the onion seedlings, the soil at the bottom of the ditch is wet, and the onion is straight. Plug in. Different grades of seedlings should be planted in different plots or shards, not tall and juxtaposed, uneven, for management. Fourth, post-plant management After transplanting green onions, it should be in hot weather with high temperature and rain, so generally do not need watering, but also remember to drain in time. Of course, if you encounter drought and high temperature, you still need to water to cool down. With the continuous growth of scallion, the farmers must remember to topdress and cultivate the soil in time. Generally speaking, the soil and topdressing are carried out at the same time. The first time to start is Liqiu, which applies 5,000 kg of fertilizer per mu and 10 to 15 kg of urea. Watering can be done after the application. The second top dressing was carried out at the time of the heat, applying 15~20 kg of urea per mu and 50 kg of cake fat. The third time is in the Bailu season. At this time, the management of fertilizer and water is very important, because the green onions enter the period of white onion, and can apply 15 kilograms of urea, 50 kilograms of phosphate fertilizer, 5 to 10 kilograms of potassium fertilizer, and 1,000 tons of human waste. In kilograms, the last is watering. The fourth top dressing is carried out in the autumnal season. Generally, 10 to 15 kg of urea is applied to the mu, and then the soil is watered. Note that the compound micro-fertilizer should be sprayed before and after the white dew. Usually, it is sprayed once every five to seven days, and even two or three times, it can increase production. V. Harvest, storage Before and after the winter, the green onions grow well, you can harvest them, usually 30 pounds for a bundle, to be placed in a cool and ventilated environment. Five or six bundles are made in one line, leaving 50 cm of passage between rows. If you encounter high temperature weather, you should unbundle and then dry. The storage of green onions is generally more afraid of heat, but also pay attention to rain. The above is the high-yield cultivation method of the onion science, such as the management and colonization of the seedling period and the management after planting. It is a place that must be paid attention to during the production process of the green onion, and the newcomers who are not proficient in mastering will come and see it several times! Radian Core Laser Tracker,Laser Tracker Radian Core,Laser Tracker With Battery Power,Core 3D Laser Tracker Automated Precision Inc. , https://www.apiasean.com
