Dawood,, S., Hamissa, A., El-Hossiny, A. (2000). RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS. Journal of Plant Production, 25(8), 5229-5240. doi: 10.21608/jpp.2000.259562
S. A. Dawood,; A. M. Hamissa; A. A. El-Hossiny. "RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS". Journal of Plant Production, 25, 8, 2000, 5229-5240. doi: 10.21608/jpp.2000.259562
Dawood,, S., Hamissa, A., El-Hossiny, A. (2000). 'RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS', Journal of Plant Production, 25(8), pp. 5229-5240. doi: 10.21608/jpp.2000.259562
Dawood,, S., Hamissa, A., El-Hossiny, A. RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS. Journal of Plant Production, 2000; 25(8): 5229-5240. doi: 10.21608/jpp.2000.259562
RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS
1Horticulture Res. Inst. Agricultural Res. Centre, Giza, Egypt
2Soil, Water & Environment Res. Inst. Agricultural Res. Centre, Giza, Egypt
Abstract
The present investigation was carried out during 1997/98 and 1998/99 seasons at the Experimental Farm of Sakha Agricultural Research Station on young Washington Navel orange trees (4-5-years old), where the soil is classified as alluvial clayey soil with slight alkalinity to study the response of young orange trees to EDTA micronutrients (Fe, Mn & Zn) foliar application alone or in combination.
The results showed a pronounced increase in leaf N, K, Fe, Mn and Zn content, while that of P was not significantly affected. Leaf chlorophyll content, plant growth (as indexed by TCSA, GR%, VI and LA) and reproductive growth (as indexed by flowering, fruit set %, fruiting %) have responded well, while preharvest drop and June drop had reduced. Remarkable increase of yield as kgs or fruit number was also observed, especially with (Zn + Mn) treatment. Fruit quality expressed as fruit weight, TSS %, total acidity % and juice volume had improved, while vit.C and peel thickness were not affected by micronutrients as foliar sprays. Zn + Mn treatment gave better results in both seasons.
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