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

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Anibal de Moraes Professor da UFPR
  • Paulo César de Faccio Carvalho Professora da UFRGS
  • Alda Lúcia Gomes Monteiro Professor da UFPR
  • Antônio Carlos Vargas Motta Professor da UFPR
  • Ricardo Augusto de Oliveira UFPR

DOI:

https://doi.org/10.1590/cab17218715

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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Author Biographies

Newton de Lucena Costa, Embrapa Roraima

Pesquisador da Embrapa Roraima

Anibal de Moraes, Professor da UFPR

Professor do Departamento de Fitotecnia da UFPR

Paulo César de Faccio Carvalho, Professora da UFRGS

Professora do Departamento de Plantas Forrageiras e Agrometeorologia da UFRGS

Alda Lúcia Gomes Monteiro, Professor da UFPR

Professora do Departamento de Zootecnia da UFPR

Antônio Carlos Vargas Motta, Professor da UFPR

Professor do Departamento de Solos da UFPR

Ricardo Augusto de Oliveira, UFPR

Professor do Departamento de Fitotecnia da UFPR

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Published

2016-04-29

How to Cite

COSTA, N. de L.; MORAES, A. de; CARVALHO, P. C. de F.; MONTEIRO, A. L. G.; MOTTA, A. C. V.; DE OLIVEIRA, R. A. 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/cab17218715. Disponível em: https://revistas.ufg.br/vet/article/view/18715. Acesso em: 18 may. 2024.

Issue

Vol. 17 No. 2 (2016)

Section

Animal Production

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