多效唑和乙烯利对妃子笑荔枝成花及碳氮营养的影响

研究喷施多效唑、乙烯利对妃子笑荔枝成花及碳氮营养的影响。试验结果表明,叶面喷施多效唑、乙烯利,能有效地控制妃子笑荔枝抽生冬梢,促进花芽分化,诱导成花;其抽花穗枝数、侧花穗枝数、成花率分别比对照高53.73%、56.16%、62.25%,花穗长度比对照长12.96%,抽冬梢枝数比对照少76.4%;喷施多效唑、乙烯利的荔枝样树其可溶性糖含量、淀粉含量、总糖含量均极显著高于对照样树(CK)的,其氮含量及C/N比值显著高于对照样树。

Effect of Paclobutrazol plus Ethephon Treatment on Endogenous Hormones and Carbon and Nitrogen Nutrients in Litchi Variety ‘Feizixiao'

[Objective] This study aimed to investigate the effect of spraying the mixture of paclobutrazol and ethephon on the endogenous hormones and carbon and nitrogen nutrients in litchi variety ＇Feizixiao＇.[Method] [Result] The results showed that foliar spraying of the mixture of paclobutrazol and ethephon could effectively inhibit litchi variety ＇Feizixiao＇ to produce winter shoots,promote the flower bud differentiation and improve flower formation rate; meanwhile,this treatment could also increase the contents of ABA and ZR,and the ratios of ABA/IAA,ABA/GA3,ZR/IAA,ZR/GA3,and decrease the contents of IAA and GA3; additionally,it could increase the contents of soluble sugar,starch and total nitrogen,and raise C/N ratio,thus improving the flower formation rate.[Conclusion] Foliar spraying of the mixture of paclobutrazol and ethephon is an effective pathway for solving warmth damage to litchi.