CAJ | 학술논문

大白菜花期长达1.0～1.5个月,开花需要消耗大量的养分。当大白菜制种田双亲之一进入终花期后,连续对另一亲本进行乙烯利喷施除蕾,可改变植株的源与库关系,减少无效分枝,促使营养物质向已结荚的种子正常发育积累,从而提高种子千粒重和有效产量。在大白菜花期,对植株喷施不同浓度（0、4 000、6 000、8 000、10 000和12 000 mg/kg）和次数（0、1和2次）的乙烯利溶液,研究不同乙烯利浓度和喷施次数的除蕾效果、抑制末花期无效分枝的作用、对制种产量和种子纯度的影响。结果表明：用40%乙烯利8 000～10 000 mg/kg药液连续喷施2次,间隔期为4～5 d,平均受药量10～15 mL/（株.次）,化学除蕾以及抑制末花期无效分枝发生的效果最佳,且对制种产量、种子发芽率以及纯度没有显著影响,能有效提高种子的千粒重和有效制种产量。
대백채화기장체1.0～1.5개월,개화수요소모대량적양분。당대백채제충전쌍친지일진입종화기후,련속대령일친본진행을희리분시제뢰,가개변식주적원여고관계,감소무효분지,촉사영양물질향이결협적충자정상발육적루,종이제고충자천립중화유효산량。재대백채화기,대식주분시불동농도（0、4 000、6 000、8 000、10 000화12 000 mg/kg）화차수（0、1화2차）적을희리용액,연구불동을희리농도화분시차수적제뢰효과、억제말화기무효분지적작용、대제충산량화충자순도적영향。결과표명：용40%을희리8 000～10 000 mg/kg약액련속분시2차,간격기위4～5 d,평균수약량10～15 mL/（주.차）,화학제뢰이급억제말화기무효분지발생적효과최가,차대제충산량、충자발아솔이급순도몰유현저영향,능유효제고충자적천립중화유효제충산량。
The blooming period of Chinese cabbage consums a large amount of nutrients,lasting naturally for 1.0-1.5 months.When one of the parents enters flowering phase,spraying continuously ethephon on the buds of the other parent,could change source and sink relationship of the plants,reduce invalid branches,and promote the accumulation of nutrients in seeds.In blooming period,spraying ethephon of different concentrations（0,4 000,6 000,8 000,10 000 and 12 000 mg/kg） by different spraying times（0,1 and 2 times） on Chinese cabbage,the effects on buds removing,invalid branches reducing,seeds yield and purity were studied.The results showed that spraying 40% ethephon of 8 000-10 000 mg/kg by 2 times,on a interval of 4-5 d,average dosage 10-15 mL/（plant·time）,gave the best effect of buds removing and invalid branches reducing,without harming significantly the seeds yield,purity and germination percentage,so the TKW and valid seeds yield could be significantly improved.