The seedling production of native fruits is an important step towards the preservation of species, commercial exploitation and sustainable employment generation. In this context, alternative fertilizers, such as rock dust, provide obtaining a substrate with higher fertility, nutrient-rich, with reduced costs in manpower and replacement of fertilization. The objective in the present research was to evaluate the initial development of camu-camu seedlings (Myrciaria dubia H.B.K. McVaugh) in function of levels of crushed basalt. The experiment was carried out in a greenhouse, at CCA/UFRR. The experimental designed was completely randomized with eight treatments and five repetitions in factorial scheme (5x2+1), being five levels of crushed basalt (0, 0.42, 1.04, 2.08, 4.17 and 8.33 g kg-1), two particle size (0.05 mm and 0.10 mm f). Vases of polyethylene of 14L of capacity were the experimental units, and the soil was a Distrofic Yellow Latosol. The incubation period of the soil in vases was for 120 days and after that period the seedlings were transplanted to vases. Six months after the transplant the height, diameter of plant, branches number, and aerial part and root dry biomass of seedlings were determined. From this data the morphologic indexes were calculated. The Treatments without crushed basalt (0 g kg-1) and the levels 0.42 g kg-1 produced seedlings of lower quality in both granulometry analyzed. The better development of seedlings of camu-camu was obtained using 4.17 e 8.33 g kg-1 of crushed basalt with 0.05 granulometry.
caçari; alternative fertilizer; ground basalt; propagation
