Biologinių preparatų ir piktžolių kontrolės būdų įtaka dirvožemio biologinėms savybėms žieminių rapsų agrocenozėje

Abstract

The field experiment was conducted at the Experimental Station of Vytautas Magnus University on the soil type Calc(ar)i-Endohypogleyic Luvisol in 2016 and 2017. The aim of investigations was to determine the influence of biological preparations and different weed control methods on the soil biological properties in the agrocenosis of winter oilseed rape. The highest earthworms number and mass was found in crop where thermal weed control and biological preparations were used. The using of biological preparations significantly increased 2.5 times earthworms number in the soil, where smothering system was used. Application of the thermal weed control method and using of biological preparations significantly 2.0 times stimulated the activity of enzyme urease in the soil, compared with plots where mechanical weed control method and smothering was used. The use of biological preparations, as compared to their non-use, significantly 2.0 times inhibited the activity of enzyme urease in the soil, where mechanical weed control method was used. The highest activity of enzyme saccharase was observed in the soil, where thermal weed control method and biological preparations were used. The use of biological preparations, as compared to their non-use, significantly 24.1% stimulated the activity of enzyme saccharase in the plots where thermal weed control method was used, significantly 14.5% inhibited the activity of enzyme saccharase in the soil, where smothering was used.