Formation of quality of winter rape seeds depending on the complex variants of its fertilization
Abstract
The aim of the research was to establish the peculiarities of the formation of fatty acid composition of winter rape seeds depending on the combinatorics of fertilizer system variants. Methods. The study was conducted during 2021–2024 on the basis of VIN-AGRO GROUP LLC on gray forest soils with medium fertility potential. The experiment was replicated four times. The placement of the variants was systematic in two tiers. The experiment involved the study of the following factors: A – annual conditions of the growing season, B – variant of the main fertilizer, C – application of growth regulators, D – foliar fertilization system. Results. The possibility of adjusting and changing both the oil content in winter rape seeds and its fatty acid composition through the combined use of optimized variants of the main fertilizer and the foliar fertilization system was proved The optimal fertilization options that allow obtaining an oil content of high-intensity winter rape hybrids at the level of 48.0% with the amount of technologically valuable fatty acids at the level of 85-87% in the total structure of its fatty acid composition were established. Conclusions. The agro-technologically expedient variant of fertilization of winter rape was determined, which provides: BBCH 00: Diammophoska N-9% P-25% K-25% (100 kg/ha) + Rosafert 5-10-25+10S (120 kg/ha); BBCH 14-18: Regulator Bukat ((thiconazole 500 g/l) (0.5 l/ha)); BBCH 19-20 (on permafrost soil): Rosafert NPK 16-14-07 (100 kg/ha) + UAN-32 (200 l/ha) + Ammonium Thiosulfate (ATS) (30 l/ha)); BBCH 35-39: Karamba Turbo 0.65 l/ha + Bukat 0.35 l/ha; BBCH 31-34: Rosalik (B, Mo, S) (1 l/ha) + adjuvant Spray-Aid (0.08 l/ha); BBCH 51-53: Rosasol 18-18-18 + ME (3 kg/ha) + adjuvant Spray-Aid (0.08 l/ha). The use of this system of combined fertilizer allows to maximize the oil content potential of rapeseed hybrids at the level of 46–48% with an optimized ratio of the main component fatty acids.
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