TRATAMENTO DE SEMENTES COM ENRAIZADORES EM HÍBRIDOS DE MILHO

Abstract

The use of rooters in the treatment of corn seeds has been increasingly common, as they stimulate greater rooting and initial start of the plants and contribute to better overcoming stress. Thus, the present research aimed to evaluate the performance of rooters applied in the treatment of seeds in two corn hybrids sown in off-season under Cerrado Domain. The experiment was carried out at Fazenda Córrego do Oriente, Nova Glória, Goiás. The cultivation system was no-tillage soon after the soybean harvest. Soybean desiccation was performed with Diquat 2 at a dose of 2 L ha-1 on 2022/02/04. The design was randomized blocks in a 2x5 factorial scheme, two hybrids (B2800VHYR and P4285VHYR) and five rooters (control, Radicel, Booster, Raynitro and Biozyme) with four replications. The variables analyzed were: plant height, height of the first ear, stem diameter, ear diameter, ear length, number of rows of grains per ear, number of grains per row, weight of one thousand grains, productivity. Data were submitted to analysis of variance and means compared by Tukey's test at 5%. There was no difference for the hybrids and for the rooters for plant height and ear diameter. The rooters promoted an increase in the mass of a thousand grains, the Raynitro was better for the hybrid P4285VYHR whose mass was 362.89 g and the Booster reached a mass of 267.70 g for the hybrid B2800VYHR. For the hybrid P4285VYHR the best rooter is Raynitro (5293 kg ha-1). The best rooters for the hybrid B2800VYHR are Booster and Biozyme, whose productivity was 5393.50 and 5326.50 kg ha-1, respectively.