This paper presents silvicultural information about "macacaúba" (Platymiscium trinitatis Benth., Leguminosae, Papilionoideae), including information on seed germination and the effect of rhizobia inoculation in the nursery. Seeds were sown in sand, germination characteristics observed for 45 days, and the seedlings were transplanted to recipients with an oxisol (latossolo amarelo), collected in the "A" horizon (0-20 cm), after the slash and burn of the vegetation, in plastic bags with 2.0 kg capacity. The plants received Ν mineral fertilization (50 kg/ha) or were inoculated with rhizobia strains from the INPA/CPCA collection. Plant development was evaluated monthly by measuring height and diameter at soil level. After 126 days in the nursery, the plants were collected and evaluated. The seed had high viability, with 86% germination, beginning four days after sowing and distributed over 37 days. The emergence velocity index (EVI) was 21,9 (n = 200). Transplanting to nursery bags can be done at 40 days. The rhizobia used for inoculation developed white colonies, 4 mm in diameter after incubation, with variable morphological and cultural characteristics. In the nursery, the plants presented slow growth and no rhizobia response, possibly due to the organic matter levels in the substrate being unsuitable for good development of the plants. The monthly height and diameter increments of the plants were 2,49 cm and 0,45 mm, respectively.
Platymiscium trinitatis ; seeds; germination; inoculation; Rhizobia; macacaúba; Leguminosae