Structural and productive differences between deferred brana, cayana and sabi grasses

The aim of this study was to identify differences in morphogenesis, structure, and forage accumulation (sabia grass) during the deferment period. The experimental design was completely randomized, with four replications in experimental plots of 12.25m2. The evaluations took place for two years, 2021 and 2022. The deferment period was 90 days. Phyllochron (PHY) and leaf senescence rate (LSR) were lower at the beginning of deferred, contrary to leaf elongation rate (LER) and population density tillers (PDT). Stem growth rate (SGR) was higher in 2021 and at the beginning of deferment. Leaf growth rate (LGR) and total growth rate (TGR) were higher at the beginning of deferment. The brauna grass presented higher PDT. The SGR and the TGR of cayana grass are superior to those of brauna grass. The brauna grass produces a canopy consisting of lighter and denser byts, compared to other weeds. In Uberlandia, MG, brauna grass with an initial height of 30cm produces less stem, while cayana grass produces more forage during deferral.