La dynamique des mauvaises herbes sous l’effet des pratiques culturales dans la zone des plaines intérieures

Abstract

The study concerned the dynamics of weed according to the cultural practices in various circumstances relating to soil and climate in three areas of the high Sétifiennes plains (North, Center and South). The analysis of 256 statements realized in parcels which were submitted to different degrees of anthropisation, has allowed us to list 178 species of weed flora distributed in 132 genres and 35 botanical families. The results obtained by the ascending hierarchical classification (CHA) and the factorial analysis of the correspondences (AFC) highlight six groups of statements and six groups of species. These species are grouped according to climatic conditions spicily the high of rainfall. The dynamics of weed is also connected to the degrees of intensification, this effect is noticed by the floral differences between the parcels of no-till, those of simplified work, the conventional work parcels and those that of extensively worked.