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Grain yield, kernel weight, and Septoria tritici blotch responses of wheat to potassium and nitrogen fertilization



Grain yield, kernel weight, and Septoria tritici blotch responses of wheat to potassium and nitrogen fertilization



Cereal Research Communications 30(1-2): 141-147



Field research was undertaken to determine the effects of potassium (60-kg/h) and nitrogen (40-kg/h) fertilization and their combinations on grain yield, 1000-grain weight and severity of wheat to Septoria tritici blotch for 2 seasons. Two Syrian wheat cultivars, Bohuth 6 (Triticum aestivum L.) and Bohuth 5 (T. turgidum var durum Desf.) were used in this study. Potassium decreased disease severity of Bohuth 5 and Bohuth 6 by 11 and 46%, respectively, which was associated with increased grain yield by 13 and 22%, respectively. Fertilizer nitrogen decreased disease severity of Bohuth 6 by 38% with a 25% increase in grain yield. Improved potassium nutrition enhanced plant development, increase kernel weights, by 21.8% in Bohuth 5 and by 33% in Bohuth 6. Nitrogen application also increased kernel weights by 16% in Bohuth 5 and 11.5% in Bohuth 6. Highest yield losses from Septoria tritici blotch occurred in nil fertilization treatments. It suggested this approach might be considered in wheat growing areas suffering from this disease in Mediterranean and similar environments.

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