Effect of different doses and application types of nitrogen fertilizer on some physiological and agronomical parameters of bread wheat genotypes

Abstract

Wheat (Triticum aestivum L.) is an important food crop in many regions of the World. Wheat production in the world depends significantly on the application of nitrogen fertilizer in the right amount and time. We studied the effect of different doses (0, 90, 120, 150kgN/ha) and application types (full, split) of nitrogen (N) fertilizer on some physiological (gas exchange, pigments content, relative water content, stem dry mass), agronomical (aboveground biomass, number of stems per unit area, grain yield) parameters of 3 bread wheat genotypes. Increasing the dose of nitrogen fertilizer had a positive effect on the parameters studied, with the exception harvest index. Full application of N was more effective. The response of the Gobustan and Gyrmyzy gul 1 genotypes to the use of N fertilizer was more strict. Keywords: Wheat, nitrogen fertilizer, physiological and agronomical parameters, pigments, grain yield