Проучване влиянието на минералното торене върху добива и структурните му елементи на царевицата, отглеждана като краткотрайна монокултура.

The study covers results for the period 2018-2021 from agrotechnical experience conducted at the Maize Research Institute – Knezha. The object of study is the Knezha 435 maize hybrid, grown at a density of 5200 plants/da. Maize was grown under control option T₀ – no fertilization and two levels of fertilization: N₅P₅K₅ (T₁) and N₁₀P₁₀K₁₀ (T₂). On average for the period 2018- 2021, the use of N₅P₅K₅ increased the number of grains in one cob by 20.5%, and the doubled dose of fertilizer – N₁₀P₁₀K₁₀ by 33.5%. As a result of these fertilizer rates, the weight of one cob increased by 10.8% and 16%. The grain weight per cob increased by 12.2% and 15.4% for variants N₅P₅K₅ and N₁₀P₁₀K₁₀, respectively. In terms of absolute weight, the effect of applied fertilizers was 6.8% and 11%, and for hectoliter weight it was 7.3% and 9.9%. The highest productivity of maize was established in 2018. The yield obtained from it was 513 kg/da for the variant without fertilization. From the use of N5P5K5, it was 714.1 kg/da and 789.5 kg/da for N₁₀P₁₀K₁₀. The increase due to fertilization was 39.2% and 53.9%. On average for the period 2018-2021, the indicated doses of fertilizer increase the maize yield by 24.8% and 41.6%, respectively. [ABSTRACT FROM AUTHOR]