ARBUSCULAR MYCORRHIZAS IN  SUGAR CANE UNDER DIFFERENT  PLANTING SYSTEMS  AND SOURCES OF NITROGEN

Jadson   Belem de Moura; Diego André   Ribeiro; Luiz César   Lopes Filho; Rodrigo   Fernandes de Souza; Leonnardo    Cruvinel Furquim

ARBUSCULAR MYCORRHIZAS IN SUGAR CANE UNDER DIFFERENT PLANTING SYSTEMS AND SOURCES OF NITROGEN

Autores

Jadson Belem de Moura

Diego André Ribeiro

Luiz César Lopes Filho

Rodrigo Fernandes de Souza

Leonnardo Cruvinel Furquim

Editor

Universidade Federal do Paraná

Descripción

This study aimed to evaluate the density of spores and mycorrhizal colonization in roots of sugarcane varieties (RB86 - 7515, CTC - 4 and CTC - 15), under planting systems , being the planting of stem portions and pre - sprouted seedlings (PSS ) along with 3 sources of nitrogen : granular fertilizer , leaf application and inoculation with diazotrophic bacteria ( Azospirillum brasilense ) . The experiment was deployed on the experimental campus of the Evangelical School of Goianésia, and was collected soil samples for spore count after the first cut. The experimental design was arranged in factorial 3x2x3 in randomized blocks with su bdivided plot s using 4 repetitions per treatment , where factor 1 was represented by varieties , fa c tor 2 by planting systems and fac tor 3 by nitrogen sources . The planting of PSS associated with foliar fertilization and A. brasiliense presented better colonization that in PSS with granular fertilizer and stem portions with leaf fertilizer and via inoculant. The granular fertilizer showed increased amounts of spores over the foliar fertilization and inoculation of Azospirillum brasilense , the planting system of stem portions presented greater quantity of s pores over the planting of PSS, i t is worth mentioning that approximate results of spore density, mycorrhizal colonization and productivity without adding granular fertilizer are satisfact ory for reducing the use of fertilizers.