Growth and sweetener content in Stevia rebaudiana Bert. biofertilized with Rhizophagus intraradices (Schenck & Sm.) Walker ted & Schüßler, and Azospirillum brasilense Tarrand, Krieg & Döbereiner in a substrate with bovine manure added

Abstract

Growth and sweetener content were evaluated in Stevia rebaudiana Bert. cv. Morita 2, biofertilized with Rhizophagus intraradices and Azospirillum brasilense in substrates (soil + sand (1: 1 v / v), and soil + bovine manure (0.70: 0.30 v / v) in nursery. 4 g of each biofertilizer were applied to the transplant in the bottom of the hole A. brasilense in a concentration of 9 x 106 bacteria g-1 and R. intraradices 40 spores g-1 of soil and 95% colonization in a completely randomized design and six replications, microorganisms and substrates were combined, with Morpho-physiological variables of yield, final content of N, P, sweeteners and colonization of roots at 60, 90 and 120 days. The largest initial growth was in soil plus bovine manure, while R. intraradices and A. brasilense induced a greater increase. in the morpho-physiological yields at 120 days, also registering a higher proportion of sweetener, N and P.