1. Soil selection and seeding
The growth period of shallots is relatively short, so it is advisable to choose sufficient water and fertilizer for cultivation. Combine land tillage and apply sufficient base fertilizer, apply 4000-5000 kg organic fertilizer per mu, 50 kg superphosphate, and rake the land into borders. The border width is 1-1.2 meters, the row spacing is 20-25 cm, and 4 rows are drilled, each 667 square meters. The sowing amount of rice is 1-1.5 kg, and the shallow soil is used to suppress watering after sowing. Shallots can be sown all year round. The most suitable sowing period in high altitude areas is spring and autumn. Spring sowing from March to April, harvest from June to July, sowing in August, harvesting from October to November, low altitude areas Overwintering cultivation is sown from late September to early October, and harvested from March to April the following year.
2. Watering and fertilizing
Since the edible parts of green onions are fresh leaves and leaf sheaths, water should be adequate, especially after sowing to about 15 cm in height. Adequate water can promote the rapid growth of green onions. After entering the mid-growth period, the amount of watering should be gradually reduced. Extreme drought or excessive humidity can cause thick roots, withered leaf tips, and affect quality. In fertilization, it should focus on promoting leaf growth, and apply quick-acting nitrogen fertilizer. The spring onions that are sown and harvested in summer should be promoted to the end in the management of fertilizer and water. After the seedlings begin to grow vigorously, generally every 20 days or so, topdressing of quick-acting nitrogen fertilizers, in conjunction with the application of appropriate amounts of phosphorus and potassium fertilizers, each time can be applied per mu About 15 kg of ammonium. For the sown overwintering green onions in autumn, the fertilizer and water should be properly controlled before the onion seedlings overwinter to prevent the seedlings from becoming too big before winter and massive bolting occurs in spring. After the green onion seedlings return to green, pour the green water in time, topdressing the green fertilizer, and promote the early growth of the seedlings. Approximately 15 kilograms of urea per mu, or other nitrogen fertilizers with equivalent nutrition. From now on, about 15 kg of ammonium sulfate per mu is applied every 20 days, combined with top dressing, and adequate watering to strengthen vegetative growth, prevent or delay bolting, and increase the yield of shallots. And must be harvested in time.
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