Dynamics of absorbed nitrogen forms in mountain-chernozem soils of Gadabay district of Azerbaijan

The article presents the results of a study conducted in 2015-2017 in Chaldash of Gadabay district on mountain-chernozem soils under Solanum tuberosum culture in rainfed conditions. The dynamics of the accumulation of absorbed nitrogen both in the soil and in the plant was studied, according to the phases of development: budding, flowering and the phase of full ripeness. According to the results of 3 years of research, it was revealed that, depending on the diet, the amount N/NH4, N/NO3 in the soil on the N93P98K126 + 20 t manure variant was 41.02-21.06 mg/kg in the budding phase, and in the phase of flowering and maturation 31.06-31.03 mg/kg and 15.17-7.98 mg/kg. The amount of N/NH4, N/NO3 in the soil in different phases of plant growth increased compared to the control variant. This is due to the fact that the applied organic, mineral and complex fertilizers led to the introduction of nitrogen N/NH4, N/NO3.