几种植物生长调节剂在大叶女贞不同生长时期疏果效应的比较分析

STUDY ON FRUIT THINNING EFFECTIVENESS OF SEVERAL PLANT REGULATORS FOR Ligustbum Lucidum AIT AT DIFFERENT GROWTH STAGES

为了解决大叶女贞在园林绿化应用中的果实污染问题,本文选择4种常用疏花疏果剂萘乙酸、乙烯利、6-BA和赤霉素,在大叶女贞不同生长时期使用,比较分析其疏果效果。结果表明:250 mg/L萘乙酸在大叶女贞开花盛期使用疏果率达到近100%,而且没有药害发生,疏除效果最佳;1 500 mg/L乙烯利在大叶女贞盛花期使用疏果率达到90%以上,在开花初期和幼果期使用疏果率均达到80%以上,也具有良好的疏果效果;250 mg/L、300 mg/L、350 mg/L 6-BA在盛花期使用疏果率达到60%~70%,与对照相比差异显著;大叶女贞现蕾期使用200 mg/L和250 mg/L赤霉素疏果率可以达到70%以上,不会产生药害。

In order to solve the problem of fruit pollution in the application of Ligustrum lucidum Ait in landscaping,the fruit-control effects on Ligustrum lucidum Ait of four plant growth regulators,naphthalene acetic acid,ethephon,6-BA and gibberellin,were analyzed in its different growth stages.The results showed that:The spraying effect of 250 mg/L naphthalene acetic acid was the best and the control effect reached nearly 100%in the flowering period.Besides,it didn’t cause phytotoxicity.The control effect of1500 mg/L of ethephon reached over 90%in the flowering period.The rate of fruit thinning in the early flowering and young fruit stages was over 80%,and it also has good fruit thinning effect.Using 250 mg/L,300 mg/L and 350 mg/L 6-BA in the flowering period,the fruit thinning rate reached 60~70%,which was significantly different from the control.The control effect of 200 mg/L and 250 mg/L of gibberellin reached over 70%at squaring stage.