The sustainable management of tropical ecosystems is one of the priorities of new millennium. The Wenge species, Millettia laurentii De Wild is a leguminous plant that plays an important role in nitrogen fixation. It has a high conservation value and represents a great interest to seek solutions and technical help; result could increase the efficiency of forestry management actions. This study was to evaluate symbiotic microorganisms of tree plant generation. And experience was conducted at the University of Yaounde I. Samples soils used was collected in three independent experiments. Experiment (1) concerned the description of botanical courses of growth, development and the beginning nodulation of Wenge. Experiment (2) concerned effects of storage temperature on the germination capacity of seeds. And experiment (3) concerned effect of symbiotic microorganisms AM F, NLB and molybdenum on generation of plants. In the laboratory, root colonization of AMF was studied. Observations of experiment showed that Millettia laurentii take up to 6 weeks to nodule. The high germination seeds capacity was reduced at a time of a given conservation temperature. The statistical analysis carried out using Excel and SAS system. A significant difference between inoculated plants and of non-inoculated plants was observed. For mycorrhiza, 22 percent increase inoculation with NLB, 56 percent and double inoculation with AMF increase and NLB , 71 percent increase as compared to the non-inoculated plants. The variability of response to inoculation was to be with respect to the time of experimentation which is limited or shorter to the expected gold or acute have effective results. It suitable if the experiment continued up-to 11 months in order to have acute or proper result.
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