洋葱大面积高产栽培技术焦作农科所皇甫柏树仝柳香一、品种的选用选用适合北方地区种植的紫红皮洋葱，该品种具有高产、优质、高效等特点。种子必须是当年采收的新种子，切忌种植隔年陈种。二、适时育苗，培养壮苗１苗床的选择：苗床应选择从未种过洋葱的无病地块，整地... Onion large-scale high-yielding cultivation technology Jiaozuo Institute of Science and Technology Huangfu Cypress with Liu Xiang A selection of varieties suitable for the cultivation of purple purple onion in the north, the varieties with high yield, high quality, high efficiency and so on. Seeds must be the new seeds harvested that year, should not be planted next year Chen species. Second, timely nursery, nurturing seedlings 1 seedbed choice: Seed beds should be chosen never planted disease-free plots of land, soil preparation ...