Year: 2024
Type: article
Abstract: To analyse the series of dynamics of winter wheat, peas, sugar beet, sunflower and soybeans under different types of crop rotation, tillage and fertilization in a long-term stationary experiment. Methods. Statistical analysis (non-parametric statistics, ARIMA method, singular spectral method) in the central part of the Left-Bank Forest-Steppe. Results. The yield of winter wheat in a crop rotation with peas under systematic ploughing was 4.67–5.15 t/ha, surface tillage interrupted by ploughing for sugar beet – 5.0–5.05 t/ha, with constant surface tillage for all crops in the crop rotation – 4.50–4.64 t/ha. In the crop rotation with perennial grasses, the yield of winter wheat grain was the highest under surface tillage – 4.89–4.95 t/ha, and under no-till and ploughing, the yield of wheat was 4.73 and 4.50 t/ha, which is significantly lower (NIR0.5=0.25) compared to systematic ploughing. The yield of maize in a crop rotation with peas and grasses was the highest under ploughing: 9.45–10.0 t/ha and 11.3 t/ha, respectively. Under no-till tillage, corn grain yields were lower by 1.03 and 0.57 t/ha and 1.7 t/ha, respectively, in crop rotations, and under surface tillage, yields decreased to 8.53–8.85 t/ha. Under moldboardless cultivation, grain yields tended to decrease, but remained within the range of reliable values: yields decreased by 0.76 and 0.57 t/ha or 9.3% and 8.8%; under surface tillage – by 0.86 and 0.92 t/ha or 10.5% and 14.3% (reliable value). Conclusions. The autocorrelation in the series of soybean dynamics in 7–10–seed rotations indicates the absence of trend, and no clearly defined cycles of grain yield changes were found. In crop rotations with a short rotation (3–5 fallow crop rotations), a cycle at lag 4 (3 years) was found at the limit of reliability, and a less pronounced cycle at lag 14 (8 years). On average, for 3–10 crop rotations, yield trends are weakly expressed, and cyclicality is weakly expressed at lags 4 and 14 (3 and 8 years). The autocorrelation function of yield change indicates a high trendiness. The cyclicality is well expressed at lags 11–13 (7–8 years), and the change in the sign of autocorrelation is observed at lag 6 (3–4 years).
Author: O.V. Demydenko
Institution: National Academy of Sciences of Ukraine
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W4400829924