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一、选地和隔离 1、选地:洋葱留种田要选沙壤土和二潮土种地。前茬以小麦、玉米、豆类、瓜类和辣椒茬为宜,避免与洋葱、韭菜、大葱、大蒜等百合科植物连作。 2.隔离:不同的品种间要求隔离1000米,提纯要求隔离1500米。 3.整地:前作收获后要及时深耕灭茬,耙耱整平,结合整地亩施4公斤优质腐熟的农家肥,17～20公斤磷肥做基肥。
First, the selection and isolation 1, the election: onion to stay farming to choose sandy loam and two Chao soil. Crops with wheat, corn, beans, melons and chili stubble is appropriate to avoid with onion, leek, green onions, garlic and other Liliaceae continuous cropping. 2. Isolation: between different varieties of 1000 m isolation requirements, isolation requirements of 1500 m isolation. 3. Site Preparation: For the harvest after the timely plowing stubble, rake 耱 leveling, with the preparation of 4 kg of high quality acre farmhouse manure, 17 to 20 kilograms of phosphate fertilizer as a base fertilizer.