Skirtingo žemės dirbimo poveikis žieminių rapsų piktžolėtumui

Abstract

The field experiment was conducted in 2018 at the Experimental Station of Vytautas Magnus University. Soil – Calc(ar)i-Endohypogleyic Luvisol. The objective of this study was to compare the influence of different soil tillage on the density and biomass of weeds in winter oilseed rape crop before harvesting. Field experiment treatments: 1. Conventional ploughing at the depth of 23–25 cm; 2. Shallow ploughing at the depth of 12–14 cm; 3. Deep loosening at the depth of 23–25 cm; 4. Shallow loosening at the depth of 12–14 cm; 5. No tillage. The first sampling of weed infestation was carried out in the spring. Reduced soil tillage and direct sowing did not have any significant influence on crop weediness in spring. Second weed sampling was done in summer. Weed biomass was significantly (P<0.05) lower in the plots where reduced soil tillage was applied, but significantly (P<0.05) higher in plots with direct sowing as compared with that in conventionally ploughed plots.