Vol: 30 Page: 333

Authors:
Mirosława Wesołowska-Janczarek
Agnieszka Kubik-Komar
Maria Jędruszczak

Title:
 Application of diversity indices to study the influence of tillage system and doses of herbicides on weed community

Language: Polish

Keywords:
species richness
eveness of species representation
diversity of species
relative abundance
weed community
tillage system
herbicide

Summary:
The paper deals with influence of tillage system and doses of herbicides on weed community, for winter wheat in first year of usage these factors. The following ecological coefficients were calculated: diversity (H’), evenness (E) and richness (DMG). Statistical analysis was used to decide which of factors has significant influence on values of these indices. There were no significant changes of values of these indices in different tillage systems. Different doses of herbicides and time of observations were factors, which significant changed characteristics mentioned above.
Results of analyses were illustrated by graph of changing values of examined coefficients.
In the paper the relative abundance coefficient (Ra) was also calculated, and mean values of this index in different tillage systems and independently from them were plotted.