Skirtingų piktžolių kontrolės būdų įtaka žieminių rapsų piktžolėtumui ir produktyvumui

Abstract

The field experiment was carried out at the Experimental Station of Aleksandras Stulginskis during 2015–2016. Soil - (Calc(ar)i-Endohypogleyic Luvisol) (LVg-n-w-cc). Object of the research: winter oilseed rape (Brassica napus L. spp. oleifera biennis Metzg.) crops. Aim of the research: the influence of weed control methods and biological preparations on winter rape crop weediness. The analysis of weed sprouts was performed before and after weed control. In each experimental plot in four randomly selected squares (0.25 m x 0.25 m) weed sprouts were counted. The effectiveness of weed control means estimated. Before harvest weeds from four randomly selected squares (0.25 m x 0.25 m) from each experimental plot were pulled, desiccated and botanical analysis was performed. Weediness expressed as units m-2 and g m-2 of dry matter