表面活性剂对铁在苹果角质膜上渗透率的影响

为了筛选高效植物表面活性剂,减少农药用量,采用紫外分光光度法测定辛二酸二乙酯(DESU)、癸二酸二乙酯(DES)和磷酸三丁酯(TBP)3种表面活性剂在不同温度、不同浓度条件下对铁元素在苹果角质膜上的渗透性。结果表明:加入表面活性剂(与不含表面活性剂的铁营养液相比),能显著增加铁元素对苹果角质膜的渗透率,TBP、DES、DESU 3种表面活性剂的最佳施用浓度分别为60mg/kg、80mg/kg、100mg/kg,其渗透性大小顺序为DES>DESU>TBP,且均在20℃时施用的作用最大。

Effect of Surfactant on Iron Permeability Rate Through the Cuticle of Apple

To select high efficiency plant surfactant and reduce the usage of pesticides,three kinds of surfactants,diethyl suberate(DESU),diethyl sebacate(DES) and tributyl phosphate(TBP),were used in this experiment,taking cuticle membrane of apple as materials,iron element including three surfactants in different density and different temperature was sprayed on cuticle membrane of apples,ultraviolet spectrophotometry was used for determination.The results showed that compared with iron nutrient fluid without surfactants,the cuticle’s absorption to iron has increased greatly after adding the surfactant.Effects of TBP,DES and DESU were best when the concentration was 60 mg/kg,80 mg/kg and 100 mg/kg respectively,the promoting efficiency of the three surfactants at the temperature of 20℃ was the best and the effect of Fe absorption was DES>DESU>TBP.