The Influence of Morphological Features of Different Winter Wheat Varieties on Competitiveness Due to Weeds

摘要

The strategy of weed regulation in organic system is based on using non-direct methods such as crop rotation and increasing the competitiveness of crops due to weeds (Eisele and Kopke 1997). The results of other authors show that the competitive ability of cereals depends on morphological features, such as: leaf area, leaf angle, tillering, early growth rate and height which influence the light penetration through the canopy and the emergence of weed seedlings (Christensen 1995, Seavers and Wright 1999). There is an opinion that modern wheat varieties are less competitive than older types (Lemerle et al. 1996). The use of herbicides to control weeds has allowed breeders to select high yielding, short varieties with high harvest index, but which in the presence of weeds are lower yielding (Didon 2002). The aim of the research was the evaluation of the influence of morphological features of selected winter wheat varieties on the competitiveness due to weeds.