Dr. Laouali Abdou was born on 01/01/1979 in SARBA (TESSAOUA / Niger). He is an engineer in Agronomy with a Master's Degree in Environmental Protection and Improvement of Sahelian Agrarian Systems obtained at the University of Niamey, a Research Master in Applied Biology, "Protection and Restoration of Sudanian and Sahelo -Saharians Ecosystems "and a PhD in Applied Biology, specialized in Plant Biology and Ecology. IHe is currently a Teacher and Researcher at the Faculty of Agronomic Sciences, Department of Plant Production, University of Diffa and responsible of the Mixed Research Unit "Aridoculture and Oasian Cultures".
Prosopis africana is a species of great socioeconomic importance but threatened with extinction in Niger because of overuse and regeneration problem.
To date, there is not much information on the vegetative propagation of P. africana using the air layering technique, especially in the Niger climatic context. The germination difficulties and lack of knowledge about vegetative propagation techniques of P. africana are a serious obstacle to the conservation of the species, given the human pressures and climatic hazards. It is then indispensable to have information of the vegetative propagation of the species to facilitate its regeneration in southern Niger where it still exists, especially to the state of isolated individuals. This study, conducted in the Maradi (Niger) area, precisely at El-gueza in the south of Gazaoua department, aims to evaluate the vegetative propagation capacity of P. africana by air layering under the sudano-sahelian climate of the south-central Niger. A ring of bark was taken on each selected branch and the wound was covered with a black plastic filled with a damp mixture of soil and wood debris. The chosen parameters are the diameter class and the position on the branch. In all, 60 branches were treated and followed for 130 days: 28.33% produced shoots and there was no significant difference between the diameter classes and between the positions. These results show that the propagate trees of the species by air layering is possible and this technique can be used to multiply and keep this species, what will reduce the regeneration problem linked to a low seed germination rate.