Desempenho de milho consorciado com cultivares de Panicum maximum manejadas com herbicidas

Abstract

The consortium between maize and forage is used to form straw to consolidate no-till or pasture and generate profits. The objective of this work was to evaluate corn intercropping with two cultivars of Panicum maximum (‘Massai’ and ‘Mombaça’), submitted to four post-emergence chemical treatments, formed by the combination of atrazine with nicosulfuron, and atrazine with mesotrione. The experiment was carried out in the field, in a randomized block design, in a 3 x 4 factorial scheme, with four replications. Chemical management with the herbicide mesotrione caused greater visual phytotoxicity in forages. The two forages differed in terms of dry matter production and the consortium influenced the stem diameter, the length of the corn cobs, the weight of 1000 grains, and the productivity of corn (p <0.05). P. maximum cv. ‘Mombaça’ produced more dry matter, but it hindered the development and productive characteristics of corn, whereas P. maximum cv. ‘Massai’ in most variables was intermediate to single corn and ‘Mombaça’. Chemical management did not change the final behavior of the consortium, and forage, mainly ‘Mombaça’, caused a reduction in corn production.