Indução do crescimento de Arachis hypogaea L. por bactérias diazotróficas

Abstract

The present work aimed to evaluate the initial growth of Arachis hypogaea L, under the effect of inoculation with diazotrophic bacteria. The experiment was conducted in a greenhouse at the Federal University of Recôncavo da Bahia (UFRB). The experiment was arranged in a completely randomized design with six treatments and seven replications, totaling 42 experimental units. The treatments consisted of two strains authorized by the Ministry of Agriculture, Livestock and Food Supply (MAPA) as cowpea inoculants, INPA 03-11B and UFLA 03-84, one test isolate, UFRB FA34C2-2, a treatment composed of a mixture of these three strains and tho contrls: one with nitrogen fertilization and one without nitrogen fertilization and without inoculation. At 50 days after sowing, the following variables were evaluated: chlorophylls (a, b and total), number of leaves (NF), area dry mass (MSPA), root dry mass (MSR) e total dry mass (MST). The obtained data were submitted to analysis of variance. Based on the significance level, the Scoot-knott mean test was applied using the statistical program “R”. There were significant results for MSPA, MSR, NF, Cl a, b and total. UFRB FA34C2-2, INPA 03-11B, UFLA 03-84 inoculants promoted higher dry matter growth of the peanut shoots.