Timoshinov R.V., Kushaeva E.ZH., Dubkov A.A., Klykov A.G., Timofeeva YA.O.
Plodorodie 2024; (5): 38-43
The paper presents the results of a study on changes in the main agrochemical parameters of soil under different fertilizer management strategies in a long-term field experiment over nine crop rotations. The experiment was set up in a heavy clay meadow brown bleached soil. Analyzing the data of the multi-year research showed that all the studied fertilizer management strategies were effective in maintaining the agrochemical parameters on a higher level than in the control variant without fertilizer application. The content of humus was determined to decrease in soil; the most significant annual loss was noted in the control and in the variant with mineral fertilizers. The application of mineral fertilizers for 77 years slightly increased soil acidity (by 0.2 pH units). Regular liming allows a decrease in the acidifying effect of mineral fertilizers on soil. The highest effectiveness was noted in the variant with the complex fertilizer management strategy that included manure, lime, and the double dose of N60P90K90. This variant was characterized by the highest amount of labile phosphorus (119 mg/kg) and exchangeable potassium (250 mg/kg), which facilitated the improvement of soil fertility (the complex agrochemical parameter = 64 points)
