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《Journal of Hebei Agricultural Sciences》 2011-08
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Study on Chemical Buds Removing Technique by Ethephon at the End of Chinese Cabbage Blooming Period in Hybrid Seeds Production

WANG Ming-qiu1,MU Jin-gui1,LI Chang-zeng2,LIU Xiao-dong1,WANG Yu-hai1(1.Institue of Cash Crops,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang 050051,China;2.Yutian County Agriculture and Pasture Bureau,Yutian 064100,China)  
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.
【Fund】: 国家大宗蔬菜技术体系石家庄综合试验站项目(CARS-25-G-05);; 河北省农林科学院前期预备项目(A11050201)
【CateGory Index】: S634.1
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