洋葱大株制种是国内大部分地区采用的制种法,但只是一栽一收,笔者这里谈的洋葱制种法,利用洋葱的大鳞茎中可萌发3～4个鳞芽,形成3～4个花薹,在花薹生长期,花薹基部可形成一个独立的小鳞茎,并含有3～4个鳞芽,秋季萌发又变成了3～4个小鳞茎,第2年抽生花薹数为第1年采种花薹数的3～4倍,利用其进行第2次制种,产量也可提高1倍。这种洋葱大株制种连续2年 Onion large plant species is used in most parts of the seed production method, but only one planted, I talk about the onion seed production method, the use of onion bulbs can germinate in 3-4 buds, the formation of 3 ~ Four flower stalks, flower stalks in the growing season, the base of the flower stalks can form an independent bulblet, and contains 3-4 buds, autumn germination has become 3 to 4 bulbs, the first two years of pumping flower stalks The number of flowers for the first year 3 to 4 times the number of flower stalks, the use of its second seed production, yield can also be doubled. This onion plantation species for 2 consecutive years