Promotor de crescimento em aveia branca visando a solubilização de fósforo

Abstract

Currently in Rio Grande do Sul (RS) it is common to monoculture soybeans or succession of cultures, where white oat pastures are observed, which serves as an alternative to contribute to the second grain harvest, increasing the levels of organic matter and rotation of crops in the growing areas. In this sense, the use of microorganisms aims to help in production, interacting with soil biota, such as Phosphorus (P) solubilizers. Thus, bacteria are a great tool to reduce costs with formulated fertilizers and provide interaction for better plant adaptability for the development of productivity. The objective of this work was to evaluate the efficiency of the P solubilizer by Pseudomonas fluorescens and Azospirillum brasilense in white oats. Eight treatments were carried out: Treatment 1 (P. fluorescens and A. brasilense and Nitrogen and Potassium), Treatment 2 (P. fluorescens and A. brasilense and Nitrogen, Phosphorus and Potassium), Treatment 3 (Nitrogen and Potassium), Treatment 4 (Nitrogen, Phosphorus and Potassium), Treatment 5 (P. fluorescens and A. brasilense, Nitrogen, Potassium and with Limestone), Treatment 6 (P. fluorescens and A. brasilense, Nitrogen, Phosphorus and Potassium and with Limestone), Treatment 7 (Nitrogen, Potassium and with Limestone), Treatment 8 (Nitrogen, Phosphorus and Potassium and with Limestone). It was verified that after evaluating the described treatments, treatment 4 obtained a greater regularity of being maintained in all evaluated indices, therefore, it leaves the suggestion for new experiments, to carry out different anagements, according to the type of soil, available organic matter, soil fertility and white oat cultivar that will be used.