| dc.description.abstract | Over the past decades, human and natural changes had led to an increase in the diversity
and abundance of weeds in cultivated lands of not only Senegal, but also across the world.
However, weed structure and dynamics were not well-known by local populations. This
research intended to study some cultural practices and some factors that can influence the
weeds presence in rice crops. Therefore, a survey and inventory were carried out at
Badiatte and Essyl. Interviews by using a questionnaire were done on cultural practices
and perceptions of local populations. To study the dynamics and structure of weeds, the
quadrant point method was used. Abiotic factors that can influence the weeds presence,
such as soil texture and pH were determined. In total, 31 species belonging to 25 genera
and 11 families were inventoried in the two villages. The Cyperaceae (Cyperus rotundus
L., Cyperus esculentus L., Killinga pumila Michx., Cyperus amabilis Vahl, Fimbristylis
littoralis Gaudich, Pycreus macrostachyos Lam., Schoenoplectus senegalensis Steud.,
Fimbristylis hispidula (Vahl) Kunth followed by Fabaceae (Desmodium triflorum L.),
and Amaranthaceae (Amaranthus viridis L.) were most abundant in terms of individuals.
The specific diversity was higher in Badiatte. The structure and dynamics of weeds
changed over time due to the agricultural practices and management. They differed from
one site to another depending on maintenance practices, soil preparation, and
environmental conditions. The weeds evolution was influenced by soil proprieties and
cultural practices (ploughing, varieties cultivated, weeding, and fertilization). | en_US |
