瓶插水pH对非洲菊切花保鲜效果的研究

摘要

[目的]研究瓶插水pH对鲜切花瓶插寿命的影响,以期筛选出保鲜液的最适pH范围.[方法]选用非洲菊品种“佛格”为试验材料,以自来水作为瓶插水,并采用柠檬酸调节酸度,研究了不同瓶插水pH对非洲菊在瓶插过程中的外观和生理特性的影响,以及花茎基部细菌总数的变化.[结果]瓶插水pH对非洲菊瓶插效果影响显著,pH小于4的处理,细菌总数少,但由于酸性大,质膜透性和MDA含量增加明显,花青素降解多,POD活性低,植株易衰老,瓶插寿命短；而瓶插水pH为5～7的处理,虽然细菌总数增多,但质膜透性和MDA增加少,花青素降解少,POD活性增加,植株衰老慢,瓶插寿命长.[结论]综合各项指标得出,瓶插水pH调整为5～7,对非洲菊的保鲜效果最佳.%[Objective] To study effects of vase water pH value on cut fresh flower and screen out the optimal pH. [ Method] With cut Gerbera jamesonii as the teat material, using tap water as the vase water and accommodating its acidity adding citric acid to form the treatments of pH, the preservation of pH of vase water was studied on the appearance quality and physiological characteristics as well as the total number of bacteria. [ Result] The pH value had significant effect on Gerbera. There were less total number of bacteria, but with higher content of MDA and membrane permeability and low POD activity in the treatments with pH below 4, so cut Gerbera jamesonii was easy to grow old and had shorter vase life. For the treatments with pH 5 , 6 and 7, though there was higher total number of bacteria, MDA content and membrane permeability increased less with higher POD activity. Therefore, cut gerbera showed more actively and longer vase life. [Conclusion] According to these characteristics of cut gerbera, pH of vase water should be adjusted from 5 to 7 with step 1 and better preservation effect would get.