BAGAÇO DE CANA-DE-AÇÚCAR COMO SUBSTRATO PARA MULTIPLICAÇÃO DE FUNGOS MICORRÍZICOS ARBUSCULARES E SUA INFLUÊNCIA SOB O ESTILOSANTES

Abstract

This work was carried out under greenhouse conditions to evaluate the growth and the mineral nutrition of the stylosanthes in response to levels of sugar-cane bagasse used as substrate for multiplication of arbuscular mycorrhizal fungi, and tested as inoculant. Randomized blocks design was used in a 4 x 3 factorial, being four levels of the sugar-cane bagasse (5, 10, 15 and 20% of the volume of the pot of 6 L) and three microbiology treatments (Control; Native Inoculum and Glomus clarum), with four repetitions. The shoot were harvested 60 days after seeding and it was analyzed the dry matter yield (DM) and root (DMR), the accumulations of crude protein (CP), P, K, Ca, Mg and S; the mycorrhizal colonization, density of spores and number of nodules. The sugar-cane bagasse promote lineal increment in the production of DM independent of the mycorrhizal inoculation. In of DMR, there is interaction between levels of sugar-cane bagasse and microbiology treatments. The inoculation with the native inoculum increases the accumulated amounts of P, K, Ca, Mg and S; the density of spores and number of nodules, the same not happening for the Glomus clarum. Crude protein and mycorrhizal colonization were not influenced by the treatments.