叶面喷施麦根酸铁对矫正山定子缺铁黄叶病的效果

通过盆栽试验，以山定于（苹果实生苗）为供试材料，用水（ＣＫ）． 乙二胺四乙酸铁（ＦｅＥＤＴＡ）、ＢＡＳＦ多元微 肥（ＢＡＳＦ）、柠檬酸复合铁（ＦＣＵ）为对比，探讨了叶面喷施麦根酸铁（ＦｅＰＳ）矫正山定子缺铁黄叶病的效果。结果表明， 叶面喷施 ＦｅＰＳ后，山定子新叶叶绿素的变化虽明显好于 ＣＫ，但前期不如 ＦｅＥＤＴＡ、ＢＡＳＦ、ＦＣＵ喷施效果明显，后期 喷施ＦｅＰＳＰ和ＦｅＥＤＴＡ、ＦＣＵ、ＢＡＳＦ叶绿素含量相近。叶面喷施ＦｅＰＳ后山定子新叶和老叶全铁含量分别比ＣＫ增加 ２２５．６２％和 ２０２．３３％，明显高于喷施 ＦｅＥＤＴＡ、ＢＡＳＦ和 ＦＣＵ。叶面喷施 ＦｅＰＳ后山定子新叶和老叶活性铁含量分别比 ＣＫ增加１２６．１１％和１５９．４１％，略低于ＦｅＥＤＴＡ喷施，但明显高于ＢＡＳＦ和 ＦＣＵ喷施。叶面喷施ＦｅＰＳ，山定子新叶过 氧化氢酶活性比ＣＫ增加１１５．４４％，远高于ＦｅＥＤＴＡ、ＢＡＳＦ、ＦＣＵ喷施，但老叶仅比ＣＫ提高５０．２２％，好于ＢＡＳＦ，略 低于 ＦｅＥＤＴＡ 和 ＦＣＵ处理。初步证明双子叶植物可以吸收麦根酸铁。

Study on the Effect of Foliar Application of FePS on Correcting Iron Deficient Chlorosis of Apple Trees

Experiment was conducted with potted seedlings of Malus baccata (L.) Borkh. for studying the effect of foliar ap- plication of FePS on correction of iron deficient chlorosis in comparison with using FeEDTA, BASF, FCU. Results showed that the chlorophyll content of young leaves after FePS application was higher than CK, but lower than that of FeEDTA, BASF, FCU application in earlier stage, similar to FeEDTA, BASF, FCU in later period .The Amount of total iron of young and older leaves of Mofus were increased by 225.62% and 202.33% respectively, as compared with CK after FePS applica- tion, which was higher than FeEDTA, BASF and FCU application. Furthermore, the active iron of young and older leaves were increased by 126.11% and 159.41% respectively after FePS application,which were lower than that of FeEDTA treatment, yet higher than BASF and FCU treatment .The catalase activity of young leaves was increased by 115.44% after FePS appli- cation, which were higher than that of FeEDTA, BASF, FCU treatment. But the older leaves was only increased by 50.22%, which was lower than FeEDTA and FCU application, yet still higher than BASF did.