Reaction of barley to top-dressing with different types of nitrogen fertilizer

Abstract

The study was carried out to investigate effect of mineral (CAN) and organo-mineral (OMF) top-dress nitrogen fertilizers on physiological and morphological parameters in three barley cultivars. The study revealed significant differences in the reaction of the cultivars in magnitude and direction of the yield structure elements. CAN had smaller effect on the studied parameters than OMF. CAN had no effect on grain yield and straw mass. Only for the cv. Novichok, there was an increase in grain weight from the main ear (15%), the length of the main ear (15%), the 1000-grain weight (2.9%). OMF led to increase grain yield in the cv. Novichok (43%), Pamiaty Rodinoy (16%), and did not change in the cv. Rodnik Prikamya. Only the cv. Novichok has increased the grain mass from the main ear (17%). The length of the main ear increased in the cv. Novichok (13%), Pamiaty Rodinoy (11%) but decreased in the cv. Rodnik Prikamya (7.5%). The influence of OMF increased the 1000-grain weight in the cv. Novichok (4.9%) and Pamiaty Rodinoy (2.5%), but decreased in the cv. Rodnik Prikamya (1.5%). Statistically differences were revealed in reaction of pigment complexes of flag and second leaves in all cultivars.