茎秆保留长度对大葱制种及下代生长的影响OA

To promote the progress of domestic welsh onion seed production technology,the welsh onion variety'Hanyu'was selected as experimental material.Eight treatments with different stem retention lengths were tested,including a control with full stem retention(CK,no cutting)and 10,15,20,25,30,35,40 cm.The effects of different stem retention lengths on the bolting,flowering and seed maturation time,seed quality,seed germination and seedling growth of the next generation of welsh onion were studied and analyzed,in order to pro vid technical support for the seed production of welsh onion.The results showed that shorter stem retention lengths facilitated bolting in the following year and reduced seed maturation time.Compared with the CK,the time to seed maturity was reduced by 3.33 d(the stem retention lengths were 10,15 cm).Regarding seed quality,the plant bolting rate,seed yield per umbel,and thousand-seed weight of the CK reached their maximum values among the treatments,which were 94.00％,2.53 g,and 3.32 g,respectively.Different retained stem lengths had certain effects on seed germination of welsh onion,but no clear pattern was observed,and further study is needed.Additionally,retained stem length did not affect the antioxidant enzyme activity of welsh onion seeds.The growth vigor of progeny seeds from different treatments was essentially the same at the seedling stage,and post-transplanting growth performance and yield were also comparable.In summary,if the objective is to accelerate the seed production cycle,the stem retention length may be set to 10 cm,as this shortens the duration of bolting,flowering,and seed maturation.If the objective is to obtain the highest seed quality,it is recommended to retain all stems during seed production to achieve optimal seed quality.