الفهرس 
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Abstract
The present study was conducted at El-Baramoon Research Station, Mansoura, Dakahlia Governorate, Egypt during the two winter seasons of 2015 and 2016 to study the effect of three water quantities (800.34, 1600.73 and 2400.40 m3/fed as common used treatment) and some antitranspirants, i.e., kaolin solutions 4%; as aluminum silicate, calcium carbonate (6%) as well as humic acid as potassium-humate (80% humic acid, 11-13% K2O) and their interactions on growth, yield, quality and some antioxidants of broccoli. Split-plot design was the experimental layout with three replicates. These experiments included 12 treatments which were the combination between 3 water quantities and 4 treatments of foliar application of antitranspirants and humic acid. We can conclude that the cultivation of broccoli (Brassica oleracea var. italica) in conditions similar to domestic consumption and exportable that the use of kaolin or humic acid under the amount of irrigation water at the rate of 1600.73 m3 / fed as the best treatment for the production of the ideal broccoli crop, which aims to maximize the Water efficiency under the conditions of this study. Moreover, the use of kaolin or calcium carbonate under the medium irrigation water quantities 1600.73 m3 / fed is recommended to prolong storage period of broccoli heads for one month at a temperature of 4°C and 95% RH. This, in turn, encourages the use of these additives to reduce water consumption by 33.3%, thus increasing the growth, yield, quality, and of storability broccoli plants grown in clay soils (Dakahlia governorate).