Influência de inoculantes e enraizadores no desenvolvimento de plantas de milho

Abstract

Corn (Zea mays) is one of the main cereals grown in the country. Nitrogen is a fundamental nutrient in crop development, however, brazilian soils have little availability of this nutrient. It is also important to use the rooting containing auxin growth regulator to help develop the root system of corn, promoting greater absorption of nutrients and water. The objective of this work was to evaluate the effect of inoculation and the bacterium Azospirillum brasilense and the rooting containing auxin growth regulator in the early stages of corn development. The experiments were conducted in a greenhouse in the city of Maringá, from May to August 2020. A Forseed 2B210 PW corn cultivar was used and the experiments were carried out in 14.5 L plastic pots, containing commercial substrate (Mec Plant), area and compost (pine bark, peat, charcoal and simple superphosphate), in 1/1/1 proportion, for 30 days. The treatments were conducted in a completely randomized design with 4 treatments and 5 repetitions of each. the treatments were: T1: corn without inoculant and without rooting; T2: with rooting and without inoculant; T3: with inoculant, without rooting; T4: with rooting and inoculant. With 10 days after planting, thinning was done leaving only one plant per pot. After 30 days, he verified the stem diameter, shoot length and fresh and dry biomass of the aerial part and root. The data indicated that the corn plants inoculated with Azospirillum brasiliense and treated with the rooting containing auxin growth regulator (T4) showed greater growth as a result of increased nitrogen incorporation and better root development. Keywords: Auxin;