Number and morphology of tiller age groups during summer in Marandu palisadegrass pastures previously used under deferred grazing

• Autor(a) principal: Santos, Manoel Eduardo Rozalino
• Data de Publicação: 2020
• Outros Autores: Carvalho, Bruno Humberto Rezende, Carvalho, Angélica Nunes de, Rocha, Gabriel de Oliveira, Van Cleef, Flávia de Oliveira Scarpino, Queiroz, Gustavo Jordan da Silva, Moraes, Lucas Santos de, Carmo, Larissa Lais Santos do
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Bioscience journal (Online)
• Texto Completo: https://seer.ufu.br/index.php/biosciencejournal/article/view/42215
• topic: Morphological composition; Mowing; Sward height; Tillering dynamics; Urochloa brizantha; Brachiaria brizantha syn; Agricultural Sciences

The relative contribution of young, mature and old tillers in the canopy influences the production and structure of the pasture. The objective with this work was to evaluate the balance between tiller appearance and tiller death (BAL) during spring and early summer, the morphology and percentages of young, mature and old tillers in Brachiaria brizantha cv. Marandu (marandu palisadegrass) with three conditions in late winter: short (24.1 cm), tall (49.0 cm) and tall (50.0 cm)/mown (8 cm). Tall and tall/mown pastures presented higher BAL in September and October, respectively. In January, BAL was higher in short and tall/mown pastures than in tall pasture. The tiller number was higher in short pasture, intermediate in tall/mown pasture and lower in tall pasture. The percentage of old tillers was higher in short and tall pastures compared to tall/mown pasture. The percentage of live leaf lamina reduced, while the percentage of dead leaf lamina increased with tiller age. Mowing of the tall marandu palisadegrass pasture in late winter increases the renewal of tillers in the spring and decreases the percentage of old tillers in the summer. The old tillers present worse morphology than young tillers.