Characterization of Natural Regeneration of Three Local Multipurpose Tree Species in the <i>Ouaddaï sahelian</i> Zone of Chad

In the Sahelian zone of Ouaddaï in Chad, Balanites aegyptiaca (L.), Sclerocarya birrea (A. Rich.) and Ziziphus mauritiana Lam. are multipurpose woody species that found agroforestry land use systems contribute to nutrition, health economy local populations. The purpose study is assess natural regeneration population structure these view their domestication. was carried out three (farms, fallows savannahs). Regeneration characterization consist a carefull excavation root system mother - tree regenerations distinguish suckers from seedlings. origin plant (sucker or seedling) determined by carefully checking see if there connection between tree. addition prudent regenerations, dendrometric parameters as well those were determined. Results show populations not uniformly distributed area. mean density trees varied significantly (0.000<0.001) (0.000<0.001). Trees wide diameter more abundant farms than savannahs Among 10151 juvenile recorded plots, 59.58% reiterations; 33.62% seedlings while 6.79% suckers. S. presented highest suckering percentage. shows percentage lowest B. aegyptiaca. registered (7.14% aegyptiaca, 12.57% Z. 14.77% birrea). ecological conditions favourable whereas suitable for growth rooting These results suggest urgent needs promote low coast vegetative propagation techniques like domestication important species.