葱头含有较多的糖、硫、磷、铁和蒜氨酸的甲基和丙基衍生物,营养价值高,具有增进食欲和抗菌的作用,且耐贮运,能很好地调剂淡季蔬菜供应。目前,我国高寒地区多栽培秋葱头,以克服夏葱头冬贮腐烂问题。一、选种近年来,各地在栽培秋葱头中,常因品种选择不当造成减产,如选用北方型品种,则“只长叶,不长头”;而选用南方型品种,“葱头小,回头早。”针对这个问题, Onion contains more sugar, sulfur, phosphorus, iron and alliin methyl and propyl derivatives, high nutritional value, with the role of appetite and antimicrobial, and storage and transportation, can well regulate the supply of off-season vegetables . At present, many cultivated autumn onion in the alpine region in order to overcome the problem of summer deciduous winter storage decay. First, the selection In recent years, all over the cultivation of autumn onions, often due to improper selection of varieties to reduce production, such as the choice of northern varieties, the “only long leaves, not long head”; and use the southern varieties, “onion small, Early. ”In response to this question,