ملخص رسالة الدكتوراه مقدمة من السيد/محمد ثروت سعيد

Ph. D. In Agriculture Science (Agronomy) , Faculty of Agriculture, Assiut University, 2011

Title.

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Physiological response of the Egyptian cotton to some cultural practices in Assiut governorate

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The main objectives of this study were to find the appropriate cultural
practices for each planting dates. This study was carried out in the two
growing seasons of 2008 and 2009. Five experiments were conducted in
each season in the Experimental Agricultural Farm, Faculty of
Agriculture, Assiut University. Each experiment represented one planting
date. Through each experiment two variables were designed in split-plot
design in which time of thinning was allotted in the main plots,
whereas splitting NPK was in the sub-plots. The obtained results could
be summarized as follows: 1- Vegetative, flowering, earliness, lint and
seed, yield and its components and fiber properties characters were
deteriorated significantly as planting date was delayed.2- The data
revealed that thinning before the second irrigation favoured vegetative,
flowering, earliness, lint and seed, yield and its components and fiber
properties characters of March plantings, whereas the reverse was true
with regard to the late plantings. i.e., thinning before first
irrigation.3- The data revealed that splitting fertilization increased
significantly vegetative, flowering, earliness, lint and seed, yield and
its components and fiber properties characters.