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What are the key techniques for high-yield onion cultivation?
1. Raising strong seedlings. Generally, sowing and seedling raising are best done from late September to mid-October. For the seedling bed, choose loose and fertile sandy loam or new land with convenient drainage and irrigation that has not grown onions or garlic. Before sowing, prepare the soil finely, apply enough base fertilizer, and form flat beds for sowing. Before sowing, soak the seeds in warm water for 24 hours, dry them, mix them with dry crushed soil, and sow evenly. Each mu requires 70-75 grams of seed sown in the seedling bed. After sowing, cover the surface with fine soil, then cover with weeds to prevent rain erosion and direct sunlight. After covering with grass, drench with diluted manure water, and scatter insect-prevention chemicals around the bed. Remove the covering weeds after the seedlings emerge. During the seedling period, drench with diluted decomposed manure water once every 5-6 days. After about 40 days of seedling growth, they can be transplanted.
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