MICRORGANISMOS PROMOTORES DE CRESCIMENTO NO DESENVOLVIMENTO DAS RAÍZES DE ARROZ DE TERRAS ALTAS

Abstract

Multifunctional microorganisms can significantly affect root development and growth of upland rice, as seedlings may provide no grain yield from the crop. The objective of this study was to determine the effect of single and combined microorganisms on root and shoot development of upland rice seedlings. The experiment was set up in a completely randomized design with treatments consisting of upland rice seeds treated with simple and combined multifunctional microorganisms (control (treatment without microorganisms), Serratia marcescens (BRM 32114), Azospirillum brasilense (AbV5), Bacillus sp. ( BRM 63573), Trichoderma koningiopsis (T-26) and the combination of all those reported). Bacillus sp. was greater (35%) in root length compared to the control. In the surface area of the roots the control is highlighted. In diameter, ABV5 presented a value (46%) higher than the control. In the length and volume ratio, all microorganisms were greater than 25.66% compared to the control. In the root volume BRM 63573 increased (50%) compared to the control. It can be concluded that multifunctional microorganisms improved root length, root surface area, diameter, length/volume ratio and root volume, providing better root development.