employee
Blagoveshchensk, Blagoveshchensk, Russian Federation
employee
Blagoveshchensk, Russian Federation
VAK Russia 4.1.2
VAK Russia 4.1.3
VAK Russia 4.1.4
VAK Russia 4.1.5
VAK Russia 4.2.1
VAK Russia 4.2.2
VAK Russia 4.2.3
VAK Russia 4.2.4
VAK Russia 4.2.5
VAK Russia 4.3.3
VAK Russia 4.3.5
UDC 631.8
UDC 631.4
UDC 631.1
UDC 631.9
The aim of the study is to evaluate the effect of different doses and forms of fertilizers on the agrochemical parameters of the soil and the yield of spring wheat under long-term crop rotation conditions. The studies were carried out in the Amur Region on the fields of a long-term stationary experiment on meadow-chernozem-like soils. The study period was 2022–2024. The field experiment was laid out in 1962–1964 in a 5-field crop rotation with 40 % saturation with soybeans and wheat and 20 % with annual grasses. The experiment was replicated three times in time and space. The studies covered 6 options: 1 – control; 2 – dose of active ingredient P30 (on average per year per 1 ha of crop rotation area); 3 – N24; 5 – N24P30K24; 6 – N42P48; 9 – N24P30 + 4.8 t/ha of manure (cattle). The objects of the study are soil and spring wheat. With an average annual load of nitrogen and phosphorus fertilizers (N42P48 kg active ingredient/ha of crop rotation area), an increase in pHKCl in the 0–20 cm soil layer by 0.2 pH units was observed. The use of phosphorus fertilizers increased the content of mobile phosphorus in the soil by 2–4 times and exchangeable potassium by 8.5–14 % compared to the control. Long-term use of mineral fertilizers decreased the humus content in the soil by 0.02–0.43 %, while the application of mineral-organic fertilizers contributed to its increase by 0.36 %. The maximum spring wheat yield was achieved with an average annual N42P48 kg active ingredient/ha crop rotation, resulting in a yield increase of 2.0–8.9 c/ha above the control. This resulted in the highest return on investment for this fertilizer dose in terms of the resulting grain yield increase – 7.1 kg/kg active ingredient – and also increased the profitability of spring wheat cultivation to 24.0 % (9.4 % higher than the control).
crop rotation, fertilizers, soil agrochemical properties, spring wheat, yield, fertilizer return on investment, profitability
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