TL根系输液法防治果树缺铁黄叶病效果研究 Ⅱ对桃树不同部位叶片营养元素变化的影响

Study on the Effects of Using TL Root Soaking Method for Correcting Iron Deficient Chlorosis of Fruit Trees Ⅱ Influence on the Variance of Nutrient Elements in Different Parts of Peach Leaves

在四川省成都市龙泉区严重黄化的桃园上，用TL根系输液法进行了桃树缺铁黄叶病防治试验。结果表明，用TL根系输液法补充铁，10～15d就可使黄化桃树叶片转绿，复绿效果达100％。同时，经TL根系输液后，不管是高浓度（TL2），还是低浓度（TL1），桃树上、中、下部叶片全铁和活性铁含量均在第11d达到最高值，然后开始下降，到第38d时，叶片全铁含量趋于稳定，和CK接近，但活性铁仍比CK大得多。对桃树不同部位叶片施用TL后叶铁含量变化分析表明，经不同浓度TL根系输液后，桃树上、中、下部叶片全铁和活性铁含量变化差异不大，相比较而言，上部叶片变化略为敏感一些。

：Experiment using TL root soaking method to correct peach tree iron chlorosis was conducted in Chendu city of Sichuan province．Results showed that using TL root soaking method，the peach tree Fe chlorosis could be corrected in 10～15 days， recoverage efficiency reached 100％．Furthermore，in both high concentration（TL2）and low concentration（TL1），after TL root soaking treatment，the contents of total Fe and active Fe of top，middle and bottom peach leaves all reached peak on the 11th day，then began to fall．On the 38th day，the total Fe contents of treated peach trees closed to that of CK，but the active Fe contents were still higher than that of CK．There existed little difference among the different parts of peach leaves．Compared with others，the top leaves changed sensitively．