洋葱根在生物实验教学中很有用处,一般采取酒精和冰醋酸按3:1混合保存根尖备用。但总不如鲜根。鉴于菜市上的洋葱头的根部枯萎,而在供水和升温的环境里也并不能在短期内如愿长出新根来。特别是在下半年开学之际,颇有求鲜根不易之感。我们作了一些试验,以冰箱催根,出根快、整齐,又方便可靠。具体方法是剔除洋葱头茎盘周围枯残鳞叶后,不必作其他任何处理,即可置于冰箱的冷藏室(1-5℃)。2-3天后,茎盘周围即有小突起出现,再置冷藏 Onion root in the biological experiment teaching is very useful, generally take alcohol and glacial acetic acid by 3: 1 mixing reserve apical spare. But not as good as fresh roots. In the light of the withering of the onion head in the vegetable market, it is not possible to grow a new root in the short term in the water supply and warming environment. Especially in the second half of the occasion, quite a few fresh roots is not easy feeling. We made some experiments to urge the refrigerator, a root fast, tidy, but also convenient and reliable. The specific method is to remove the onion head and stem disk around the residual leaf scale, do not have to do any other treatment, you can be placed in the refrigerator freezer (1-5 ℃). 2-3 days later, there are small protrusions around the stem plate appears, and then placed cold storage