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1 严把基地关1.1 选肥大葱怕重茬,要选择地势平坦,土壤肥沃,灌排方便,两年以上没有种过葱蒜类及韭菜的中性或微碱性土壤。1.2 隔离大葱是虫媒花,雌雄同花,异花授粉作物,主要由昆虫传粉。空气干燥时,成熟的花粉可随风漂移十米到数十米,近距离可借风力传粉,为防止生物混杂,要选好隔离。如采取开放式授粉采种,需有1000m 以上的间隔距离。
1 strict base off 1.1 Selection of green onions afraid of cropping, to choose flat, fertile soil, irrigation and drainage convenience, more than two years have not planted onion and garlic and leek neutral or slightly alkaline soil. 1.2 Isolation Welsh green onions flowers, monoecious, cross-pollination crops, mainly by the insect pollination. When the air is dry, the mature pollen can drift 10 meters to tens of meters with the wind, pollination can be carried out by wind force in close range. Such as the adoption of open pollinated seed, need to have more than 1000m distance.