Field experiments were conducted in the winter season of 2019 with the aim of determining the effect of spraying glutamic acid with nitrogen fertilization on the growth, productivity and nutritional status of wheat plants, (Triticum aestivum L., cv. Sakha 69). The experimental treatments consisted of spraying glutamic acid at three different concentrations, (50, 100; 200 ppm) with nitrogen fertilization at three rates(80, 100; 120 kg N fed-1).
The results indicated that spraying with high concentration of glutamic acid (200 ppm) with a higher rate of nitrogen fertilization (120 kg N fed-1) gave the best and highest values for both growth and yield characteristics of wheat. It was also found to increase nitrogen fertilization rates from 80 to 120 kg N fed-1 with increasing concentrations of spraying with glutamic acid from 50 to 200 ppm, which led to the enhancement and improvement of the physiological characteristics of wheat plants, as the green pigments and carotenoid values increased in wheat leaves, and the content of protein and carbohydrate in wheat grains also improved greatly Non-significant effects of the different experimental treatments appeared on the content of the N, P and K in wheat leaves.
Spraying with glutamic acid on wheat plants with an optimal level of nitrogen fertilization gave great results on the growth and yield of wheat and also improved the nutritional status of wheat plants.
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