الفهرس 
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Abstract
Two field experiments were carried out at El-Gemmeiza Agricultural Research Station, El-Gharbia Governorate during two successive seasons of 2014 and 2015. These experiments were conducted to study the effect of foliar CO2 as a nano fertilizer in the form of Lithovit (which produced by using nanotechnology application) by using four rates (without, 2.5, 5 and 7.5 g/l) twice (at 45 and 60 days after planting) and foliar spraying with three levels of Potasin-P (2.5, 5 and 7.5 cm3/l) twice (at 46 and 61 days after planting) under three planting dates (8th April, 8th May and 8th June) as well as their interactions on leaves chemical composition, growth characters, earliness traits, seed quality, seed cotton yield and its components and fiber quality of the Egyptian cotton (Gossypium barbadense L.), cultivar Giza 86. Leaves chemical composition, boll weight, number of bolls/plant, seed cotton yield / plant and seed cotton yield / feddan in both seasons were significantly affected by planting dates in both seasons, in favour of early planting date (8th April). Delaying planting date significantly increased leaves proline content and leaf peroxidase and phenoloxidase activity which indicate the presence of heat stress on the plant. Leaves chemical composition, boll weight, number of bolls/plant, seed cotton yield / plant and seed cotton yield / feddan in both seasons were significantly affected by planting dates in both seasons, in favour of the high and the medium levesl of Potasin-P (5cm3/l) in both seasons. Using the high rate (7.5g/l) of foliar CO2 as a nano- fertilizer (in the form of Lithovit) twice significantly increased leaves chemical composition, boll weight, number of bolls/plant, seed cotton yield / plant and seed cotton yield / feddan in both seasons. Sown cotton early on 8th April and applying the high level of Potasin-P (7.5cm3/l)twice at 46 and 61 days after planting in combination with the high rate (7.5 g/l) of foliar CO2 as a nano fertilizer (in the form of Lithovit) twice (at 45 and 60 days after planting) significantly increased leaves chemical composition, boll weight, number of bolls/plant, seed cotton yield / plant and seed cotton yield / feddan in both seasons and significantly reduced leaves proline content and leaves peroxidase and phenoloxidase activity which reflect on induced favorable plant conditions and on reduce environmental stress effect. So, this interaction treatment could be recommended to obtain high productivity and quality under El-Gharbia Governorate conditions.