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

Authors

  • Manoel Eduardo Rozalino Santos Universidade Federal de Uberlândia
  • Bruno Humberto Rezende Carvalho Universidade Federal de Uberlândia
  • Angélica Nunes de Carvalho Universidade Federal de Uberlândia
  • Gabriel de Oliveira Rocha Universidade Federal de Uberlândia
  • Flávia de Oliveira Scarpino Van Cleef Universidade Estadual Paulista
  • Gustavo Jordan da Silva Queiroz Universidade Federal de Uberlândia
  • Lucas Santos de Moraes Universidade Federal de Uberlândiaa
  • Larissa Lais Santos do Carmo Universidade Federal de Uberlândia

DOI:

https://doi.org/10.14393/BJ-v36n1a2020-42215

Keywords:

Morphological composition, Mowing, Sward height, Tillering dynamics, Urochloa brizantha, Brachiaria brizantha syn

Abstract

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.

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Published

2020-01-01

How to Cite

SANTOS, M.E.R., CARVALHO, B.H.R., CARVALHO, A.N. de, ROCHA, G. de O., VAN CLEEF, F. de O.S., QUEIROZ, G.J. da S., MORAES, L.S. de and CARMO, L.L.S. do, 2020. Number and morphology of tiller age groups during summer in Marandu palisadegrass pastures previously used under deferred grazing. Bioscience Journal [online], vol. 36, no. 1, pp. 173–182. [Accessed25 November 2024]. DOI 10.14393/BJ-v36n1a2020-42215. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/42215.

Issue

Section

Agricultural Sciences