The influence of different densities of invasive weeds on the dry plant biomass of soybean

Abstract

The goal of our research was to examine the competitive ability of selected soybean varieties and invasive weeds, and opportunity to select the most competitive soybean varieties based on their dry plant biomass. Field trials were conducted in 2020 and 2021 at location Novi Sad. Three varieties of soybeans with different morphological traits from the same maturity group (NS Apolo, Fortuna, NS Zmaj) and three very harmful and difficult to control invasive weeds (Abutilon theophrasti, Ambrosia artemisiifolia and Xanthium strumarium) were selected for the tests. The additive design with four replications were used. Soybean was sown at a density of 450,000 seeds ha‐1 and six rows per plot with inter‐row spacing of 50 cm. After soybean sowing, all weeds were sowed on the same time in four densities by hand (0.5, 1, 5 and 10 weeds per m‐1).