After the beginning of autumn, the focus of lush green field management is to promote roots, strong trees and soil softening, strengthen fertilizer and water management, and create suitable environmental conditions for the formation of light blue, thus improving the yield and quality of welsh onions.
First, timely fertilization and watering
After the beginning of autumn, when the growth of plants is accelerated, topdressing "foliar manure" is applied to promote the growth of the leaf parts. After the white dew begins to enter the vigorous growth period of scallions, it is the key period for the development of welsh onion production. It should be combined with watering to apply “attacking the tree-fertilizer†twice, and in conjunction with the spraying of fruit and shuangtingling, it can improve the water absorption capacity of the plants and enhance the fruit. Yield and quality. After watering in the shallow cultivator, generally 2 or 3 times, the principle of watering is to dry the soil on the ridge and moisten the soil in the ditch.
Second, timely earth
Welsh onions should be cultivated several times in a timely manner to enable the onion to grow faster and thicker. It can be divided into 4 to 5 times of earth, and it is not appropriate to raise the height of each earth to be cultivated. Over-cultivation of soil is not conducive to the rapid growth of light blue and white, excessive soil caused by rotten heart, the formation of reduced yield or yellow leaves.
Third, timely control of pests
Onion pests and diseases mainly include downy mildew, black mold, purple spot disease, leaf miner, and root borer. It is recommended to use a highly targeted agent together with a new high-fat film to improve the control effect and reduce the amount of pesticides.
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