Effect of some bio-stimulators on yield and fruit quality of apricot

In order to evaluate the effect of some bio-stimulators on yield and fruit quality of apricot cv. Shekar pareh management functions was in the spring of 2014 in Abarkouh of Yazd province. The experiment was based on randomized complete blocks design with seven nutritional treatments included control (water spraying), humic acid one and two per thousand, aminol forte three and six per thousand and humi forte 0.5 and 1 per thousand in four replications. Bio stimulators were applied just spray twice during the growth period including two weeks after full bloom and a month after it. Results showed bio-stimulators effects significantly affected the measured traits except for the titratable acidity (based on malic acid), firmness and maturity index .Humic acid treatment reduced physical properties, total soluble solids and vitamin C. Aminol Forte with three per thousand concentration increased most of the physical and chemical characteristics, but three per thousand to six per thousand concentrations had the effect of decreasing. Also humi forte increases fruit's carotenoid and vitamin C. Therefore, it seems that in between treatments, aminol forte bio-stimulator enhanced yield and improve the quality of apricot fruit. So recommended the spraing of aminol forte with three per thousand concentration at the suitable time.