Dirvožemio biologinių savybių palyginimas žieminių rugių agrocenozėje įvairiose sėjomainose

Abstract

The field experiment was conducted in 2016 and 2017 at the Experimental Station of Vytautas Magnus University. Soil – Calc(ar)i-Endohypogleyic Luvisol. The objective of this study was to compare the activity of soil enzymes (urease and saccharase) and determine number ant mass of earthworms in winter rye agrocenosis applying various crop rotations. The highest activity of enzymes urease (0.29 mg NH3 g-1 soil 24 h-1) and saccharase (28.9 mg glucose g-1 soil 48 h-1) was determined in soil of plots where winter rye was cultivated after second year perennial grasses in the field crop rotation with row crops. The lowest activity of enzymes was in three-course crop rotation where winter rye was drilled after black fallow. Significantly higher increase of earthworms number (from 2.2 to 11.1 times) and biomass (from 2.4 to 13.6 times) was found in soil where winter rye was cultivated in the field crop rotation with row crops and seeded after second year perennial grasses compared to other crop rotations.