Effect of different foliar application of iron compounds on alleviating leaf chlorosis in apple trees

• Main Authors: Yahya Abadi,Mojtaba, Reisi,Farhood, A'rabi, Mojtaba, Esteki,Ma'soumeh
• Format: Publication
• Language: Persian
• Published: Isfahan(Iran) Isfahan Agricultural and Natural Resources Research Center 2002
• Subjects: ABONOS; APLICACION FOLIAR; APPLES; APPLICATION FOLIAIRE; CHLOROSE; CHLOROSIS; CLOROSIS; ENFERMEDADES DE LAS PLANTAS; ENGRAIS; FER; FERTILIZERS; FEUILLE; FOLIAR APPLICATION; FRUITS A PEPINS; FRUTAS DE PEPITA; HEAVY METALS; HIERRO; HOJAS; http://www.fao.org/aos/agrovoc#c_1579; http://www.fao.org/aos/agrovoc#c_2223; http://www.fao.org/aos/agrovoc#c_25497; http://www.fao.org/aos/agrovoc#c_2867; http://www.fao.org/aos/agrovoc#c_3008; http://www.fao.org/aos/agrovoc#c_3950; http://www.fao.org/aos/agrovoc#c_4243; http://www.fao.org/aos/agrovoc#c_541; http://www.fao.org/aos/agrovoc#c_5962; IRON; LEAVES; MALADIE DES PLANTES; MANZANA; METAL LOURD; METALES PESADOS; PLANT DISEASES; POME FRUITS; POMME

Leaf chlorosis in field crops and trees is caused by iron deficiency. This phenomenon is due to lack of absorption or deactivation of iron in plant. In calcareous soil of Iran due to high pH, high level of lime, and high level of bicarbonate in the irrigation water, iron absorption is low. Therefore, foliar application of mineral iron compounds may be more effective and economical that application of expensive iron chelate. A field study was conducted in Semirom area to study the effect of foliar and soil application of different iron compound for alleviation of leaf chlorosis and yield enhancement of apple trees using a complete randomized block design. The treatments were foliar application of iron sulfate, Baharan iron chalate, Jonoobgan iron fertilizer, pure water,(control) and soil application of Sequestrin 138. The leaf chlorosis was visually scored and yields were measured. The result shows that soil application of Sequestrin 138 resulted in the highest increase of greening of chlorosis leaves. Foliar application of iron sulfate was superior to other compounds in due to faster and quicker greening of the leaf however, none of the compound were able to increase yield during the first year. Keywords: Iron, chlorosis, apple, bicarbonate