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Seedling management before the winter to control the water and fertilizer, to prevent the seedlings is too large or leggy, and strictly control the pre-winter seedlings no more than 3 leaves, plant height of 10 cm is appropriate. When the soil begins to freeze, pour enough frozen water and return it to green water. From returning green to planting, fertilize 2 to 3 times with water, applying high nitrogen fertilization (24~6~14) 16 kg per acre. Watering was stopped 10 days before planting, and seedlings were planted to facilitate seedlings. Watering was conducted the day before planting to facilitate seedling raising.
Timely planting of green onions is a very frightful way of continuation, and the masses have to say “hot-to-hot, must-have, and green-on-your garlic not to meet†and so on. Mushi fermented organic fertilizer 5000 kg, Shi Kefeng (16~8~18) long-term slow-release fertilizer 50 kg, superphosphate 50 kg. When planting 3/4 for site preparation, concentrate fertilization 1/4 when drilling. Deep plowing 25 centimeters to fully mix the soil and fertilizer, and open the ditch with a row spacing of 80 cm. The ditch depth is 40 cm and the width is 20 cm. After concentrated fertilization in the ditch, the ditch will be loosely planed and planted at a spacing of 6 cm. Before transplanting, 3 kg of chlorpyrifos granules were used to kill and kill underground pests (chlorpyrifos is an excellent variety to replace highly toxic pesticides).
Field management of fertilizer and water management enters the summer season after the colonization, slow seedlings are relatively slow, if the weather is not very dry, generally should not be watered again, should strengthen the cultivator, in order to promote root growth. In case of heavy rain, pay attention to drainage and prevent onions and gutters from collecting water. After the beginning of autumn, the onion demand for water and fertilizer increased, combined with high nitrogen fertilization and irrigation (24~6~14) 16 kg per acre. When the heat is applied, the combination of watering and high-nitrogen fertilization (24~6~14) of 16 kilograms per acre is performed. After the white dew, the green onions began to grow vigorously. It was necessary to combine high-potash fertilization (14~6~24) and 16 kilograms per acre for the white dew festival and autumn season to meet the need for light green growth.
During the whole growing period of welsh onion, it is four times in the beginning of autumn, summer heat, white dew, and autumn, and the first and second cultivating soils should be shallow; the third and fourth cultivating soils should be thick, and the thickness of each cultivating soil should be cultivated to the highest It is advisable to leave it at the mouth of the leaf. Never leave the growing heart. After the dew had dried in the morning, the soil was cool and the soil was cool.
There is wax powder on the onion leaf surface of the onion pests. In order to improve the adhesion of the chemicals, neutral soap should be added in the liquid medicine, and the application time should be in the morning.
Appropriate seedlings are planted with new seeds before and after the autumnal equinox sowing, with 3 kg per acre, 8 to 10 acres can be planted.