Journal of Crop Production and Processing

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In order to evaluate the effect of trinexapac ethyl concentrations (0, 250 and 500 g/h) and traffic stress (traffic and non traffic) treatments on wheat grass physiological and morphological traits, an experiment was conducted on research farm of Isfahan University of Technology in 2011 - 2012 as factorial in completely randomized designs with three replications. The studied traits involved plant height and plant density, shoot dry weight and fresh weights, tillering, chlorophyll level, roots and shoot dissolved carbohydrates. Results showed that Trinexapac ethyl reduced plant height, fresh weight and dry weight of cut parts significantly. Application of 250 and 500 g/h Trinexapac ethyl decreased plant height by 21.23 percent and 31.85 percent respectively. Application of Trinexapac ethyl improved plant height, tillering and chlorophyll level. In contrast, chlorophyll level was decreased substantially under traffic treatment and this treatment did not affect wheat grass density and tillering significantly. Under 500 g/h Trinexapac ethyl treatment, tillering was increased by 36 percent compared with under control condition one. Results showed that Trinexapac ethyl application and traffic increased dissolved carbohydrates of root and shoot significantly. As a result, it was found that wheat grass is a traffic resistant plant and it seems that the use of Trinexapac ethyl increases plant resistance to traffic stress

Keywords: Wheatgrass, Trinexapac-ethyl, Traffic stress, Growth rate

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