Resumo

AGUIAR, Regina Lúcia Félix de; MAIA, Leonor Costa; SALCEDO, Ignácio Hernan  e  SAMPAIO, Everardo Valadares de S. B.. Interaction between arbuscular mycorrhizal fungi and phosphorus on growth of Prosopis juliflora (Sw) DC. Rev. Árvore [online]. 2004, vol.28, n.4, pp. 589-598. ISSN 0100-6762.  http://dx.doi.org/10.1590/S0100-67622004000400013.

The effect of arbuscular mycorrhizal fungi (AMF) and addition of phosphorus on seedling growth of Prosopis juliflora in sterilized and unsterilized soils was followed during 100 days. A red-yellow podzolic soil, pH of 4.7 and 2 mg Pdm^-3, was used. The experiment was carried in a completely randomized design, with four replicates, and factorial arrangement of 2 soil conditions (sterilized and unsterilized) × 3 P levels (0, 50 and 100 kg P.ha^-1) × 2 mycorrhizal treatments (with and without AMF). In unsterilized soil, only the collar diameter increased with inoculation; increases in height, number of leaves, and dry matter (DM) production perhaps were due to soil P fertilization. In sterilized soil, inoculation resulted in increases in height, number of leaves, collar diameter and DM production with or without P additions (P0 and P50), in relation to the non-inoculated treatment. A further increase in P (P100) cancelled the effect of the inoculation. Colonization and spore production was enhanced with P additions. Prosopis juliflora could be considered as mycotrophic facultative, since it presents growth response to both AMF inoculation and P supply.

Palavras-chave : seedling production; AMF; soil sterilization.