Etude floristique et écologique des mauvaises herbes des cultures de la région de Batna

Abstract

The study of crop weeds in the Batna region during the crop year 2008/2009

covered 114 phytoecological performed on different crops. They were

distributed throughout the study area in order to take into account the

variability of ecological and agronomic factors. The weed flora has 120 weeds

species. Broadleaf weeds are dominant with 98 species (81.66%), monocots

include 22 species (18.33%). Species identified are divided into 95 genera and

30 botanical families. The biological type shows that annual dominate and form

69.16% (83 species), perennial 19.16% (23 species) and biennials 11.66% (14

species). A case (01) whose frequency is between 60% and 80%, while ten

species (10) between 20 and 40%. Frequency (- 20%) contained in most of the

species (109 species). The analysis of the relationship between the relative

frequency of species and their abundance-dominance shows average 05 types

of species. The results obtained by the AFC show two groups of statements, two

species groups and two groups of environmental factors, these results explain

the distribution of weeds in crops of Batna region according to climate, crop

type and soil conditions.