Abstract

CARNEIRO, R.F.V.; MARTINS, M.A.; ARAUJO, A.S.F.  and  NUNES, L.A.P.L.. Phosphorus fertilization and arbuscular mycorrhizal inoculation in culture of mixed forages. Arch. zootec. [online]. 2011, vol.60, n.232, pp.1191-1202. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000400034.

This work, carried out under greenhouse, had for objective to evaluate the response of the intercropped Stylosanthes and Andropogon grass to arbuscular mycorrhizal inoculation and levels of phosphorus in soil no sterilized (natural conditions). A randomized blocks design was used in a 4 x 3 factorial scheme (four phosphorus levels: 0, 60, 120 and 240 mg dm^-3 of soil) and three microbiology treatments (control; inoculation with Glomus clarum and inoculation with native inoculum) with three repetitions. Were accomplished two cuts of the aerial part, each 60 days. It was analyzed the production of dry matter of the aerial part and root, the accumulations of crude protein, P, K, Ca, Mg, and S, percentage of mycorrhizal colonization in both plants and density of spores. The results demonstrated that the increase of the doses of P increased significantly the studied variables. Those results were evidenced with the arbuscular mycorrhizal inoculation, specially for the species Glomus clarum, mainly for the first cut. The participation of the legume in the dry matter total of the mixture was increased by the arbuscular mycorrhizal inoculation in the smallest levels of P. The mycorrhizal colonization and the density of spores were not affected by the microbiology treatments.

Keywords : Glomus clarum; Mineral nutrition; Native inoculum.

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