Abstract

The study was conducted in the nursery of the Horticulture Department, College of Agricultural Engineering Sciences, Duhok University, Iraq, during the period from 01 September 2024 to 01 June 2025 for the fall season to investigate the response of three cold turf grass seeds mixtures included (1, 2 and 3) to two concentrations of Salicylic acid (0 and 10 mg L-1) was spray every month after germination of seeds and different concentrations of benzyl adenine (0, 100 and 200 mg l-1) was spray two times. The experiment was performed by using Factorial Experiment Randomized Complete Block design with three factors and three replications. The results explained that the spray turf grass mixture with 10 mg L -1 of salicylic acid had a significant effect on plant density (210.19 plants 100 cm-2), mowing number (2.67), cumulative dry weight of vegetative growth (25.20 g) and percentage of carbohydrates in clipping yield (0.88%). The foliar sprayed of turf grasses mixture with benzyl adenine (BA) at 200 mg L-1 significantly superior than control and 100 mg L-1 in total carbohydrates in clipping yield (0.89%), whereas results at concentration of 100 mg L-1 of BA caused significant increase in plant density (208.39 plants 100 cm-2) as comparison with other concentration. As for turf grass mixtures noticed that mixture 1 was significantly superior to two other mixtures in the pant density (218.78 plant 100 cm-2, leaf area (2.64 cm2), cumulative dry weight of vegetative growth (24.92 g) and root depth (21.03 cm), while mixture 3 was significantly superior to other mixture in total carbohydrates in clipping yield (0.91