洋葱,原产中亚西亚,可分为黄皮洋葱、红皮洋葱和白皮洋葱。栽培洋葱应抓以下措施:(1)选择品种。洋葱对光照、温度等较为敏感,应以当地品种为主,南、北方不能轻易大量引种,以防早期抽苔及发生小球现象。洋葱隔年陈种会失去发芽力,应用新种子。(2)播种、定植。9月中旬播种,播量为每亩3.5—5公 Onion, native to Central Asia, can be divided into yellow onion, red onions and white onions. Cultivation of onions should catch the following measures: (1) choose varieties. Onions are sensitive to light and temperature, should be based on local varieties, South, North can not be easily introduced in large quantities to prevent the early bolting and the occurrence of small ball phenomenon. Onion Chencha will lose germination, the application of new seeds. (2) sowing, planting. Seeding in mid-September, sowing 3.5-5 per acre