Nicotinamida, Azospirillum brasilense e fitohormônios como bioestimulantes em milho

Abstract

Biostimulants are products capable of improving the performance of the corn crop, resulting in higher grain yields. In this sense, the objective of this experiment was to evaluate the effect of the application of nicotinamide, A. brasilense and synthetic phytohormones via the leaves as biostimulants in the corn crop. A randomized block design with eight treatments and four replications was used. The treatments consisted of control treatments and its application of a mixture of phytohormones, present in the product Stimulate® (S), nicotinamide (N), Azospirillum brasilense (A) and their combinations S+N, S+A, N+A and S+N+A. Growth characteristics, yield components and grain yield of corn were evaluated. The isolated use of the biostimulant Stimulate® favored the corn crop, promoting increases of 0.1810, 0.4322 and 8,155 kg in the mass of grains per ear, thousand grain mass and grain yield, respectively. The

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highest value for leaf chlorophyll index was obtained with the isolated use of A. brasilense. The isolated nicotinamide and the mixture of biostimulants were not favorable for the evaluated variables.