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Purpose: to identify an effective combination of primary soil tillage methods, fertilizer background, water consumption features at different sowing dates and their influence on the yield of new pea varieties in Rostov region. Materials and methods. The research was carried out in 2022–2023 at the experimental stationary of the scientific center. The following were studied: basic soil tillage methods (plowing, combined, chiseling) (factor A); fertilizer backgrounds: 1) without fertilizers, 2) Р₄₀K₄₀, 3) P₆₀K₆₀, 4) P₈₀K₈₀, 5) N₁₅Р₄₀K₄₀, 6) N₃₀P₈₀K₈₀ (factor B). Sowing was carried out in two stages. Soils are ordinary chernozem. Results. Higher yields were obtained in the variants of the 1st sowing date, regardless of cultivation and fertilizers. The increase was 6.3–6.8 % for the Donets and 6.9–8.4 % for the Amulet varieties, compared with the data for the 2nd term. A decrease in yield was noted with combined and chisel tillage, regardless of the fertilizer background and sowing dates; it was 6.0–6.3 and 5.2–5.3 % for the Donets and Amulet varieties, respectively; 4.9–5.2 and 3.5–4.7 %, compared with plowing (factor A). The highest pea yield according to factor B was provided by the N₃₀P₈₀K₈₀ variant: 3.03 and 2.86 t/ha for the Donets varieties, 2.56 and 2.39 t/ha for the Amulet varieties. The yield increases reached 0.89–0.93 t/ha (44.3–45.2 %) and 0.67–0.71 t/ha (38.3–38.9 %), respectively, compared to the control. The difference in average yield between the P₈₀K₈₀ and N₃₀P₈₀K₈₀ variants did not exceed 0.09–0.13 t/ha for the Donets variety and 0.03–0.06 t/ha for the Amulet variety. Conclusions. The best average yield was obtained in the variant with plowing and N₃₀P₈₀K₈₀ nutrition at the first sowing period in 2023, amounting to 3.72 t/ha for the Donetsk variety and 2.91 t/ha for the Amulet variety. The lowest water consumption coefficient of peas was also noted here – 804 m³/t. |
