如何预防洋葱“双胞胎”?想提高洋葱商品质量,提早预防双胞胎很关键。洋葱发生双胞胎的概率很高,严重影响商品价值,应尽早预防。发生双胞胎的原因是:播种过早,冬前秧苗过大;苗期施用氮肥过多;暖冬、倒春寒等,上述因素均会造成苗期二次分蘖,形成双胞胎。此外,苗期生长 How to prevent onion “twin”? To improve the quality of onion products, early prevention of twins is the key. Onion twins have a high probability of serious impact on the value of the commodity, should be prevented as soon as possible. Twins are due to: sowing too early, too large winter seedlings; excessive nitrogen fertilizer applied at seedling stage; warm winter, late spring cold, etc., these factors will result in secondary tillering seedling, the formation of twins. In addition, seedling growth