GROWTH DYNAMIC AND FORAGE YIELD OF Trachypogon plumosus UNDER LEVELS OF SOIL FERTILITY CORRECTION AND REGROWTH AGES

Authors

  • Newton de Lucena Costa Embrapa Roraima, Boa Vista, Roraima, Brasil
  • Anibal de Moraes Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil
  • Paulo César de Faccio Carvalho Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brasil
  • Alda Lúcia Gomes Monteiro Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil
  • Antônio Carlos Vargas Motta Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil
  • Ricardo Augusto de Oliveira Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil

DOI:

https://doi.org/10.1590/1089-6891v17i218715

Keywords:

Animal Nutrition

Abstract

bstract
We assessed the effects of levels of soil fertility correction (control, liming, fertilization and liming + fertilization) and of regrowth ages (21, 28, 35, 42, 49, 56, 63, 70, 77, and 84 days) on growth dynamic and forage yield of Trachypogon plumosus in the Roraima´s savannas. Dry matter (DM) yields, absolute growth rate (AGR), net assimilation rate (NAR), and leaf area ratio (LAR) increased consistently with regrowth age, while the crop growth rate (CGR) was inversely proportional to regrowth age. The grass showed high responsivity to soil fertility improvement. Liming + fertilization or fertilization alone provided higher DM yields (1,934 and 1,661 kg ha-1), AGR (36.6 and 31.5 kg ha-1.day), CGR (32.5 and 27.9 kg ha-1.day), NAR (4.993 e 4.152 g/m2), LAR (152.9 and 140.9 cm2/g), and LAI (2.42 and 2.14). Regrowth intervals of 56 to 63 days for liming + fertilized and fertilized pastures, and 63 to 70 days for control or liming pastures were appropriate to provide maximum forage yields, growth rates and to prevent larger losses relative to senescence and leaf death.
Keywords: dry matter; growth rate; leaf area.

 

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Published

2016-04-29

How to Cite

COSTA, Newton de Lucena; MORAES, Anibal de; CARVALHO, Paulo César de Faccio; MONTEIRO, Alda Lúcia Gomes; MOTTA, Antônio Carlos Vargas; OLIVEIRA, Ricardo Augusto de. GROWTH DYNAMIC AND FORAGE YIELD OF Trachypogon plumosus UNDER LEVELS OF SOIL FERTILITY CORRECTION AND REGROWTH AGES. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 17, n. 2, p. 175–184, 2016. DOI: 10.1590/1089-6891v17i218715. Disponível em: https://revistas.ufg.br/vet/article/view/18715. Acesso em: 6 dec. 2025.

Issue

Vol. 17 No. 2 (2016)

Section

Animal Production

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