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通过甜菜的两个播种期试验初步明确到,在连续光照(自然光照加夜间补充光照)条件下适当施加赤霉素,可使甜菜安生苗当年抽苔、现蕾、开花、结实,在四个月内完成其生育期,因而有可能大大缩短甜菜的育种年限。这项研究对甜菜的育种实践会有一定意义。通过今年的试验,我们再次观察到赤霉素对于甜菜实生苗的抽苔具有促进作用。这种实生苗即使未经受低温处理,在点滴以赤霉素后即可抽苔。同时,赤霉素对处于连续光照条件下甜菜实生苗的现蕾、开花也具有明显的增益作用,能大大提高后者的现蕾开花率。一般文献所载种株甜菜达到抽苔、开花需要3℃左右的低温,看来对于实生苗甜菜这并非是绝对的。在一定程度上它可为赤霉素所代替。同时未给以低温条件及赤霉素处理的实生苗,若处于续续光照条件下,也可达到抽苔、现蕾、开花。
Through the two seeding periods of sugar beet, we initially determined that applying gibberellin in continuous light (natural light plus night light) can make boll moult, budding, flowering and fruiting in the same year, Month to complete its growth period, which may greatly shorten the breeding life of sugar beet. This study will be of some significance to beet breeding practice. Through this year’s experiment, we once again observed that gibberellin can promote the bolting of sugar beet seedlings. Even if this seedlings have not been subjected to low temperature treatment, they can be bolted after gibberellin is dripped. At the same time, gibberellin has a significant gain effect on budding and flowering of sugar beet seedling under continuous lighting conditions, which can greatly increase the latter’s budding flowering rate. It is not absolute for the seedling beet to appear to have been obtained by bolting the sugar beet in the general literature and requiring about 3 ° C for flowering. To some extent it can be replaced by gibberellin. At the same time did not give low temperature conditions and gibberellin treatment of seedlings, if under continuous light conditions, but also to achieve bolting, budding, flowering.