Manejo de dessecação de aveia + ervilhaca para cultivo do milho

Abstract

The oat + vetch consortium stands out among the options of cover crops in an autumnal period in the southern region of Brazil as it allows the production of a biomass in relation to a nitrogen balance to corn and soil protection. The objective of this work was to evaluate the effects of herbicide (Cletodim and 2,4-D) on the oat and vetch consortium and their effects on the biomass production potential of cover crops and their actions on the yield of maize crop. The experiment was conducted at the experimental farm of the Universidade Tecnológica Federal do Paraná - Campus Dois Vizinhos, in a randomized block design and four replications. The management strategies of oat + vetch were: Treatment | - Desiccation oats + vetch 38 days before maize sowing (DBS); Treatment 11 - Desiccation oats 38 DBS + Desiccation of vetch on the day of maize sowing; Treatment III - Total desiccation 16 DBS and Treatment IV - Desiccation oats 16 DAS + Desiccation vetch DS. The herbicides used were clethodim and 2,4-D. There was a difference in the accumulation of total biomass of oats + vetch between treatments, and the longer the development period of the plants, the greater the biomass accumulation potential. The best management from the point of view of optimization the biomass production potential of the cover plants did not result in higher maize yield grown in sequence due to the negative effects on the planting and final stand of the maize plants.