ESTABLISHMENT OF ARBUSCULAR MYCORRHIZAL FUNGI IN Mimosa artemisiana SEEDLINGS IN DIFFERENT SUBSTRATES

Abstract

ABSTRACT: The inoculation of Arbuscular Mycorrhizal fungi (AMF) in seedlings is feasible.  In this stage the plants are too much fertilized, what may inhibit the AMF.  The objective of this work was to evaluate the establishment of two AMF in Mimosa artemisiana seedlings growing in phosphorus rich substratum.  The research was developed in a greenhouse condition, at the Embrapa Agrobiologia, in trays with 72 cells, each one with 100 mL of substratum comprised of organic matter (30 %), clayed soil (30 %) and sand (40 %). The experiment had 5 treatments, being 2 of inoculation with Glomus clarum Nicolson & Schenck and Glomus etunicatum Becker & Gerdemann  and 3 not innoculated. The innoculation increased the mycorrizal colonization in the roots.  The seedlings were well colonized despite the phosphorus level in the substratum, what may guarantee the survival in the transplant to degraded areas.   KEY-WORDS: Fast-growing tree, mycorrhizae, plant nutrition.