YIELD AND QUALITY OF AMARANTH GRAIN DEPENDING ON FERTILISER RATES
DOI:
https://doi.org/10.32636/agroscience.2025-(4)-3-1Keywords:
amaranth, structure, yield, quality, economic efficiencyAbstract
Due to the wide variety of data, often contradictory, the study of mineral fertilizer application rates for amaranth cultivation under conditions of sufficient moisture is highly relevant. The objective of this research was to determine the yield level of Kharkivskyi 1 amaranth variety, yield structure indicators, amaranth grain quality, and economic feasibility of its cultivation depending on fertilizer application rates. The research was conducted in the zone of sufficient moisture in the western Forest-Steppe of Ukraine in 2020–2022 at the experimental field of Lviv National University of Life and Environmental Sciences. The plot area was 30 m², with three replications. The plots were arranged systematically. Seven fertilizer application rates were studied for the Kharkivskyi 1 variety: N₀P₀K₀, N₄₀P₂₀K₄₀, N₈₀P₄₀K₈₀, N₁₂₀P₄₀K₈₀, N₁₆₀P₆₀K₁₂₀, N₂₀₀P₈₀K₁₂₀, and N₂₀₀P₈₀K₁₆₀. It was established that increasing the mineral fertilizer application rate from N₀P₀K₀ to N₂₀₀P₈₀K₁₆₀ provided an increase in grain yield of Kharkivskyi 1 amaranth variety from 2.31 t/ha to 4.88 t/ha, representing an increase of 2.57 t/ha. The highest yield level was formed with the following structural elements: grain weight per plant – 27.8 g and plant density – 18 plants/m². Under the influence of mineral fertilizers, the protein content in amaranth grain increased from 16.2% in the control treatment without fertilizers to 18.9% in the N₂₀₀P₈₀K₁₂₀ and N₂₀₀P₈₀K₁₆₀ treatments, which represents an increase of 2.7 percentage points. Oil content was less dependent on fertilizer rates and varied within the range of 7.5–8.0%. With an increase in mineral fertilizer rates to N₂₀₀P₈₀K₁₆₀, oil content increased to 8.0%, representing an increase of 0.5 percentage points compared to the treatment without fertilizers. The treatment with fertilizer level N₂₀₀P₈₀K₁₂₀ showed the best economic efficiency indicators, with net profit increasing to 70,813 UAH. The profitability level in the studies ranged from 134% to 149%.
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