Oat Response in Plant Morphological Parameters and Panicle Productivity Elements in Relation to Soil Tillage and Fertilization Systems

The study evaluated the influence of the soil preparation and fertilization system on some morphological parameters and productivity elements in oats. The field experiments were organized within the ARDS Lovrin, agricultural year 2024 - 2025. The culture was located on a plot with chernozem soil, medium fertility, in a non-irrigated system. The biological material was represented by the spring oat, 'Ovidiu' variety. Four land preparation options were considered: soil preparation by plowing at 18 cm (P); soil preparation by discing (D); soil preparation by superficial scarification (SS); soil preparation by deep scarification (DS). Three types of fertilization were applied to each soil tillage option: NPK complexes (15:15:15) at a dose of 150 kg/ha commercial product (F1); NPK complexes (15:15:15) at a dose of 150 kg/ha + ammonium nitrate 150 kg/ha, commercial products (F2); NPK complexes (15:15:15) at a dose of 150 kg/ha + ammonium nitrate 200 kg/ha, commercial products (F3). Complex fertilizers were applied in autumn, and ammonium nitrate was applied in spring. The parameters plant height (PH, cm), number of leaves (LN), panicle length (PL, cm), number of grains in panicle (PGN), and weight of grains in panicle (PGW, g) were determined. The PH parameter showed low variability in all variants. Parameters LN and PL showed low and moderate variability, and parameters PGN and PGW showed low, moderate and high variability in relation to experimental variants. The difference between the mean and median values ​​was confirmed (ANOVA Test, Kruskal-Wallis Test) for the parameters considered in relation to the experimental variants. The Post Hoc Test confirmed significant differences between certain experimental variants, in relation to each parameter considered.