THE IMPACT OF MULTIPLE DOSES OF NITROGEN FERTILIZERS ON THE GROWTH AND DEVELOPMENT OF YOUNG PLANTS OF CATALON VARIETY HAZELNUT

The article presents the results of studies, carried out in 2020–2021 in the commercial hazelnut orchard planted in 2018 by LLC “Vyazovetsky Sad”, Molodechno district, Minsk region. The purpose of the studies is to examine the impact and highlight the nitrogen fertilizer application system that optimizes the growth and development of young hazelnut plants Catalon varieties, planted according to two patterns of placement. It was revealed as a result of the study, that the additional application of nitrogen fertilizers at a dose of 60 and 120 kg a. e. had an impact on the growth rates of hazelnut plants – the area and total increase in the cross-sectional area of the bole, biometric parameters and the area of the leaf surface of plants were significantly larger compared to the control variant. In total, over 2 years of research, higher yield was noted in the variants of applying increased doses of nitrogen fertilizers, however, the highest yield was obtained in the variant of nitrogen application at a dose of 120 kg a. e.: with a planting pattern of 5.0 × 3.5 m – by 128.4 % (3.61 c/ha), with a planting pattern of 5.0 × 3.0 m – i.e. 49.2 % (3.18 c/ha) more than in the control variant.