Two field experiments were conducted at the experimental farm station of the Faculty of Agriculture at Moshtohor, Benha University, during two growing successive winter seasons of 2009 and 2010 to study the effect of some treatments assimilates transport – inducing materials (potassium citrate ), antioxidants (salcylic acid, putrscine and humic acid), energy source (phosphoric acid) , and setting - inducing material (NAA) on growth, flower abscissions, chemical characteristics such as enzyme activity and seed yield and yield components of faba bean Faba vulgaris cv balday plants. Treatments were as follow: potassium citrate at 500ppm, salicylic acid at 200ppm, putrescine at 200 ppm, humic acid at 500 ppm, phosphoric acid at 500 ppm and naphthalene acetic acid (NAA) at 20 ppm. In addition, water was used as control during 2009 and 2010 seasons.Results showed that all applied tratments increased growth characteraistics (plant height, leaf number, number of branches, total leaf area, dry weight of leaf and stems and assmilation rate, flowering behaviour (number of flower and % setting) and yield and yield componenents during 2009 and 2010 seasons.In addition chemical analysis at 70 days and at harvest time i.e. mineral elements,total carbohydrates contents,crude protein, total free amino acids,were increased with all applied teatments during 2010 season. Enzymatic activity, total phenol,content decrease with all applied tretments compared with the control.Also, NAA gave the highest values in all growth characterastics during 2009 and 2010 seasons.
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