树干输液和叶面喷施铁肥对缺铁黄化柑橘的矫正效果

目的]研究树干输液和叶面喷施铁肥2种补铁方式对柑橘叶片缺铁矫正的效果。方法]通过叶面喷施和树干营养袋输入0.18%、0.27%、0.36%铁肥,研究树干输液和叶面喷施铁肥对缺铁黄化柑橘的矫正效果。结果]叶面喷施和树干输液均可显著提高叶片和果皮铁含量,增加柑橘单果重,提高果实可溶性固形物含量,降低可滴定酸含量,显著增加糖酸比,使果实品质得到改善。叶片铁含量和单果重、果实可溶性固形物含量和总糖含量极显著正相关,与果实可滴定酸含量和果肉硬度极显著负相关。结论]当铁肥浓度一致时,树干输液补铁效果优于叶面喷施铁肥,其中树干输液0.36%铁肥对缺铁黄化柑橘补铁效果最好。

Correction Effect of Iron Fertilizer Application by Spraying on the Leaf and Trunk-injection on Iron Deficiency Chlorosis in Citrus

Objective] To study correction effect of iron fertilizer application by spraying and trunk-injection on iron deficiency chlorosis in citrus trees.Method] Correction effect of iron fertilizer application by spraying and trunk-injection on iron deficiency chlorosis in citrus trees were studied by spraying and trunk-injection 0.18％,0.27％,0.36％ iron fertilizer.Result] Leaf spraying and stem infusion could significantly improve the leaves and peel the iron content,increase the citrus fruit weight,increase the fruit soluble solids content,lower titratable acid content,significantly increase sugar acid ratio,improve fruit quality.Iron content and fruit weight,fruit soluble solids content and total sugar content had very significant positive correlation,and titratable acid content and fruit pulp hardness had significantly negative correlation.Conclusion] When the concentration of iron fertilizer was consistent,trunk-injection was better than that of the leaf spraying iron fertilizer,and trunk-injection 0.36％ iron fertilizer was the best for iron deficiency.