Aveia preta inoculada por azospirillum brasilense e submetida a diferentes doses de nitrogênio

Abstract

In most agricultural activities, the availability of nitrogen is one of the factors that most limits production, and it is no different in the culture of black oats. Black oat is widely used both for animal feed and as ground cover, due to its high nutritional value and good capacity to establish itself in various climatic conditions. Thus, the objective of this work was to evaluate whether the variation of nitrogen dose and addition or not of the inoculant Azospirillum brasilense has interference in the physiology of black oat. The experiment was conducted in a greenhouse in Severiano de Almeida, and the experimental design used was randomized block design with four repetitions. The treatments were composed of different doses of nitrogen fertilization with and without addition of inoculant Azospirillum brasilense in the seed. Plant height, stem diameter, number of tillers and green biomass were evaluated and, in the laboratory, the percentage of N, P and K in roots and aboveground was determined. Based on the results obtained, it can be concluded that the Azospirillum bacterium associated with doses of nitrogen or not provided favourable results in the oat crop in relation to the diameter of the stem, height of the plant, number of tillers. There was no interaction between doses of N and the use of inoculant with respect to the levels of potassium, phosphorus and nitrogen in the leaves. The dry mass of the aerial part and roots was greater as there was an increase of the N doses and the use of Azospirillum brasilense.