Morphogenesis of age groups of marandu palisadegrass tillers during the stockpiling period

Amanda Aparecida  Brito; Lorena Carla  Adorno; Victor Santana  Novais; Gustavo Segatto  Borges; Bruno  Gomes                         Borges; Kimberly Barcelos  Gois; Manoel Eduardo Rozalino  Santos

doi:10.4025/actascianimsci.v44i1.53901

Amanda Aparecida Brito Universidade Federal de Uberlândia
Lorena Carla Adorno Universidade Federal de Uberlândia https://orcid.org/0000-0002-8484-2429
Victor Santana Novais Universidade Federal de Uberlândia https://orcid.org/0000-0003-3716-3498
Gustavo Segatto Borges Universidade Federal de Uberlândia https://orcid.org/0000-0002-8756-1809
Bruno Gomes Borges Universidade Federal de Uberlândia
Kimberly Barcelos Gois Universidade Federal de Uberlândia
Manoel Eduardo Rozalino Santos Universidade Federal de Uberlândia https://orcid.org/0000-0002-3668-4518

DOI: https://doi.org/10.4025/actascianimsci.v44i1.53901

Keywords: pasture structure; stockpiled pasture; tiller number; Urochloa brizantha.

Abstract

The stockpiled forage canopy consists of tillers at different ages, which have specific development patterns. The objective was to understand the development of Urochloa brizantha cv. Marandu during the stockpiling period, by the morphogenic evaluation of tillers at different ages. The experiment was conducted in a completely randomized design, in a split plot scheme, with four replications. Three tillers ages (young, mature and old) and two periods of stockpiling (initial and final) were evaluated. The leaf appearance and elongation rates were higher in young tillers (0.05 tiller^-1 day^-1 and 0.62 cm tiller^-1 day^-1, respectively), compared to old tillers (0.02 tiller leaf^-1 day^-1 and 0.20 cm tiller^-1 day^-1, respectively). The final leaf length of the tillers' age groups was the same in the beginning of stockpiling. The number of live leaves was lower in the old tillers (2.4), compared to the young (3.6) and mature (4.1) ones, contrary to the stem length. The number of old tillers (800 tillers m^-2) was higher than the young (299 tillers m^-2) and mature ones (358 tillers m-²). The participation of different age groups of tillers in the canopy influences the development and structure of marandu palisadegrass.

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