The purpose of the research was to establish the effect of new complex fertilizers and modern biological preparations on the yield of wheat spelt of the Pskovityanka variety. The research work was carried out on the experimental field of the Laboratory of Agricultural Technologies of the Pskov Scientific Research Institute of Agriculture in 2024–2025. The preparations were used at the following doses: Strada N (3 l/ha), Mg +Zn (0.5–2.0 l/ha), Rizobact (0.1–0.2 l/ha), Humate 7+ (0.3–0.5 l/g). Foliar fertilization was carried out during the vegetation period in the phase "full tillering – early stem elongation". Optimization of mineral nutrition for the planned harvest increases the yield of wheat spelt by an average of 15%. At the same time, the use of the studied preparations for the background of mineral nutrition (N90P50K90) improves the quantitative indicators of the elements of the crop structure: the number of grains per ear, the weight of grain per plant, the weight of 1,000 grains. The best grain yield indicators were obtained when applying Humate 7+ and Strada N preparations according to the background of mineral nutrition (N90P50K90) in the "full tillering – early stem elongation" phase. They averaged 1.94 and 1.88 t/ha over two years, respectively. Research proves the prospects of using the used preparations in conjunction with basic mineral fertilizers on the Pskovityanka spelt variety.

Mazin Aleksei M.

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