ICDSUPL5-T005

Volume: 5, 2026
5th International PhD Students’ Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT

Abstract number: T005

DOI: https://doi.org/10.24326/ICDSUPL5.T005

Published online: 22 April 2026

The effect of application methods of microbiological preparations on oat yield

Dorota Jagiełło

Department of Plant Production Technology and Commodity Sciences, University of Life Sciences, 13 Akademicka St., 20-950 Lublin, Poland

^{Corresponding author: dorota.jagiello@up.lublin.pl}

A two-year field experiment was established in 2025 on a private farm located in the village of Rzeczyca Księża. The crop was grown on soil with a slightly acidic reaction (pH_KCl 6.2) and low mineral nutrient content: 9.8 mg·100g^-1 P₂O₅, 9.9 mg·100g^-1 K₂O, and 3.1 mg·100g^-1 Mg. The aim of the experiment was to determine the effect of different application methods of biostimulants containing live microorganisms on the yield and quality of the oat cultivar ‘Bingo’. The research hypothesis assumed that the use of different application methods of microbiological preparations would influence the yield and quality of oat production, compensating for a 25% reduction in soil NPK fertilization.

The preparations were applied in the following treatments: (1) 100% soil NPK fertilization (NPK100) without microbiological preparations; (2) soil NPK fertilization reduced to 75% (NPK75) without microbiological preparations; (3) NPK75 + soil application of Bacillus spp. bacteria (Pd); (4) NPK75 + foliar application of Bacillus spp. bacteria (Pn); (5) NPK75 + foliar application of Pseudomonas spp. bacteria (Nn); (6) NPK75 + soil application of Bacillus spp. and foliar application of Pseudomonas spp. (Pd+Nn).The preparations were applied once: Pd (pre-sowing), Pn (BBCH 02 stage), and Nn (BBCH 04 stage) at the manufacturer-recommended rate of 1 l·ha^-1.The experiment was conducted on plots with an area of 12.5 m² in three replications.

Preliminary results of the field experiment under different application methods of the preparations showed a significant decrease in oat yield only in treatments Nn (5.6 t·ha^-1) and NPK75 (5.8 t·ha^-1). In the remaining treatments, yield ranged from 6.3 to 6.5 t·ha⁻¹. The highest protein content was recorded for NPK100 (10.6%) and Pd (10.3%), whereas the lowest value was observed for NPK75 (8.7%). Additionally, plant height was measured and yield components were analyzed, including the number of panicles per 1 m², grain number and grain weight per panicle, thousand grain weight (TGW), and grain bulk density. The contents of macro- and micronutrients were also determined under laboratory conditions.

Keywords: application method; microorganisms; yield

How to cite

Jagiełło D., 2026. The effect of application methods of microbiological preparations on oat yield. In: 5th International PhD Students’ Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL5.T005