Structure of piatã palisadegrass deferred for two periods and fertilised with nitrogen

Gabriel de Oliveira Rocha, Manoel Eduardo Rozalino Santos, Hélio Henrique Vilela, Bruno Humberto Rezende Carvalho, Braulio Maia de Lana Sousa, Jailson Lara Fagundes, Alfredo Acosta Backes, Pryanka Thuyra Nascimento Fontes
2020 Semina: Ciências Agrárias  
The deferred pasture structure determines the consumption and performance of grazing animals and, in addition, can be influenced by the duration of the deferment period and nitrogen (N) fertilisation. The objective of this work was to evaluate the structural characteristics of Brachiaria brizantha syn. Urochloa brizantha cv. Piatã (piatã palisadegrass) deferred for two periods (79 and 127 days) and with four N doses (0, 40, 80 and 120 kg ha-1) in the Zona da Mata of Minas Gerais, Brazil. The
more » ... ais, Brazil. The experimental design involved complete randomised blocks and a subdivided plot scheme, with three replications. The 127-day period of deferment resulted in a higher forage mass, falling index, stem percentage and density, but a lower number of tillers, percentage and volumetric density of live leaf blade. The N dose increment, in general, worsened the structural characteristics of the piatã palisadegrass deferred for 127 days. However, with the 79-day period, the N fertilisation increased the volumetric density of live leaf blades and reduced the stem percentage in the forage mass. As a preliminary recommendation, piatã palisadegrass can be deferred for 79 days and fertilised with up to 90 kg ha-1 of N in the region of Zona da Mata de Minas Gerais, Brazil.
doi:10.5433/1679-0359.2020v41n3p995 fatcat:ihnvhzttejhnpclepu5gjyzxsq