عنوان مقاله [English]
This study was designed in order to investigate the effect of foliar spraying of brown seaweed water extract (Nizamuddinia zanardinii) at different levels of nitrogen on some physiological, biochemical, parameters and yield of wheat (Triticum aestivum cv. Chamran 2). The experiment was based on a factorial study with completely randomized design and three replications at five levels (0, 5, 10, 15, and 20 percent) of brown seaweed water extract and three levels of nitrogen (0, 34.5 and 69 kg.hec-1). Leaf area, photosynthetic pigments, soluble carbohydrates, protein, and proline content at seedling stage and plant height, spike length, and total harvest index of plant at complete mature stage were measured. The results showed that application of brown seaweed extract led to a significant increase in the studied growth parameters in comparison with the control. Application of brown seaweed extract at concentration of 10% along with 34.5 kg.hec-1 nitrogen resulted in the highest leaf area, photosynthetic pigment content, carbohydrates, protein, plant height, spike length, and total harvest index. The maximum amount of proline was observed at concentration 20% of brown seaweed extract. According to the results, using brown seaweed extract at 10% concentration along with 34.5 kg.hec-1 nitrogen led to the maximum quality and yield of wheat.
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