The influence of pre-crops on spring barley crop weediness in different crop rotations

Leidinio DOI: https://doi.org/10.7220/1822-9913.2020The field experiment was carried out at the Experimental Station of Vytautas Magnus University Agriculture Academy in 2018. Soil – Hapli-Epihypogleyic Luvisol. The influence of the preceding crop was investigated on the weedness of spring barley. The annual weed species dominated in the spring barley crop: Echinochloa crus-galli, Persicaria lapathifolia, Fallopia convolvulus, Chenopodium album, Galinsoga parviflora. Significant reduction in weed number (1.9 to 5.7 times), compared to other rotations was in intensive crop rotation, when spring barley was grown after maize. In intensive crop rotation, weed dry matter mass was significantly from 2.9 to 6.3 times lower than in cereals, field crops, forage and Norfolk crop rotationsAgronomijos fakultetasVytauto Didžiojo universiteta