Onion is a biennial herb of the family Liliaceae. The seed collection methods are divided into three methods: adult planting, semi-planting and small planting. (1) Planting seeds: The green onions of the year can be harvested, and the soil can be cultivated in the second year to prevent seeding. The onion can also be harvested and stored for planting in the second and third quarters of the next year. This method is costly. (2) Half-strain seed production; that is, plant age between the seedlings and adult plants in the prime time, from June to July nursery, colonization from September to October, the second year seed collection, seed cost is low. (3) Seed production in small plants, with short seed collection period and low yield, should not be adopted. Seed selection: The selected plant stays neat, robust, and has the characteristics of this variety. The pseudo stem is thick and solid, the leaves are short and strong, and the seedlings are left without seeding and storage. Planting plants will plant 2-22 thousand plants per acre, and half plants will plant 3.5-45 thousand plants. In late May, the seeds matured and harvested in stages. As long as more than 80% of the seeds on the flower ball mature, they can be harvested. After the collection, put it in a ventilated dry place and dry it. Do not expose the sun to the affected germination rate. After a few days of drying, gently knead the flower bulbs, take out the seeds, fully dry them, hang them in bags or store them in a magnetic cylinder.
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Onion propagation technology