PJB-2017-834
ENHANCE SUNFLOWER PRODUCTIVITY BY FOLIAR APPLICATION OF SOME PLANT GROWTH BIOSTIMULANT UNDER SALINITY CONDITIONS
SONA SALEM EL-NWEHY
Abstract
Two field trials were conducted during 2015 and 2016 to determine the stimulant effects of foliar spraying with some growth stimulating including potassium humate, cytokinin and algae extract on growth, nutrients content, and seed and oil production of sunflower var.Helianthus annuus L. plants cultivated in saline and calcareous soil and irrigated by saline water. The results showed that foliar spraying with potassium humate, cytokinin and algae extract resulted in a significant increase in growth parameters (plant height, stem diameter, number of leaves), nutrients content, seed yield, head characteristics and oil content of sunflower. The foliar application 1 g/l of algae extract was the best treatment where it recorded the highest values of all parameters, 1469.7 kg seed /fed was achieved with percent increase of 23% and 369.9 kg oil/fed. with percent increase of 37% comparing with control. Algae extract treatment gave also the highest value of the net return (6927 LE fed-1 ) as well as, the economic efficiency (net return / total cost = 1.7). It could be concluded that foliar spraying with Algae extract was the most effective to increasing growth parameters, seed yield, oil content, and chemical composition as compared to the other treatments under salinity stress.
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