Plant and Soil Science

Photosynthetic activity of oat crops under combined application of mineral fertilisers and biological preparation

Mykola Suchek, Svitlana Kalenska, Bruce Knight, Roman Sonko
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Abstract

The effectiveness of photosynthesis in oat crops with the combined use of mineral fertilisers and biological products in order to reduce mineral fertiliser rates and increase productivity is extremely relevant. The aim of the study was to establish the effectiveness of the combined use of mineral fertilisers and biological preparations by activating the photosynthetic activity of oat crops and their productivity. The study was conducted using field, laboratory and mathematical methods of analysis. The research results were statistically calculated and interpreted. The results of research on the formation of leaf surface area and net photosynthetic productivity of the ‘Ivory’ oat variety in the right-bank forest-steppe zone of Ukraine depending on fertiliser rates, pre-sowing treatment of seeds with biological preparations of phosphate-mobilising action Polymixobacterin based on the bacterium Paenibacillus polymyxa, and Mycofix based on the mycorrhizal fungus Glomus intraradices using treated and untreated seeds. With combined treatment of seeds with a fungicide and Mycofix, the maximum leaf area was formed – 44.6-64.5 thousand m²/ha depending on the fertilisation background. When sowing with treated seeds against the background of N₉₀P₉₀K₉₀, 60.9 thousand m²/ha of leaf area was formed, and when treated with fungicide and additional treatment with Polimixobacterin or Mycofix against a background of N₉₀P₆₀K₉₀, 61.3 and 63.9 thousand m²/ha, respectively. With a reduction in phosphorus to N₉₀P₃₀K₉₀ and seed treatment according to the same scheme, the leaf area was 61.0 and 63.2 thousand m²/ha, respectively, at the BBCH 62-65 stage. A close positive correlation was established – the correlation coefficient between yield and leaf area at the BBCH 63-64 stage was 0.87-0.89. The practical value of the study was to establish a compensatory effect of the combined use of biological preparations and mineral fertilisers, which made it possible to reduce fertiliser application rates without reducing the photosynthetic activity of crops and oat yield

Keywords

leaf area; net photosynthetic productivity; fertiliser rates; Polymixobacterin; Mycofix; yield

Suggested citation
Suchek, M., Kalenska, S., Knight, B., & Sonko, R. (2025). Photosynthetic activity of oat crops under combined application of mineral fertilisers and biological preparation. Plant and Soil Science, 16(4), 82-96. https://doi.org/10.31548/plant4.2025.82
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