MORPHOGENESIS OF Trachypogon vestitus UNDER BURNING EFFECT, DURING DRY SEASON, IN RORAIMA’S SAVANNAS

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Vicente Gianluppi Embrapa Roraima
  • Anibal de Moraes UFPR, Curitiba, Paraná

DOI:

https://doi.org/10.5216/cab.v13i1.12803

Keywords:

Forrage

Abstract

The effects of plant regrowth age (21, 28, 35, 42, 49, 56, 63 and 70 days) on dry matter (DM) yield, and morphogenetic and structural characteristics of Trachypogon vestitus, submitted to burning, during dry season, were evaluated under natural field conditions. The experimental design was completely randomized, with three replications. Evaluations were carried out during the period from December 2009 to February 2010. DM yields, absolute growth rate, number of tillers/plant (NTP), number of leafs/plant (NLP), leaf area, leaf senescence and elongation rates and blade length (BL) increased consistently with growth stage (P<.05). The relations among DM yield, forage production rate, NTP, NLP and BL with plants regrowth age were described by the quadratic regression model and the maximum values were estimated at 64.8; 42.3; 59.6; 61,8 and 59.4 days of regrowth, respectively. The crop growth and relative growth rates, tiller and leaf appearance rates were inversely proportional to plant age.

KEYWORDS: dry matter; leaves; morphogenesis; plant age; tillering.

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Author Biographies

Newton de Lucena Costa, Embrapa Roraima

Engenheiro Agrônomo. Mestre em Agronomia. Manejo de Pastagens.

Doutorando em Agronomia, Produção Vegetal, UFPR, Curitiba, Paraná

Vicente Gianluppi, Embrapa Roraima

Pesquisador da Embrapa Roraima.

Mestre em Agronomia.

Anibal de Moraes, UFPR, Curitiba, Paraná

Professor Associado II, UFPR, Curitiba, Paraná

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Published

2012-03-29

How to Cite

COSTA, N. de L.; GIANLUPPI, V.; MORAES, A. de. MORPHOGENESIS OF Trachypogon vestitus UNDER BURNING EFFECT, DURING DRY SEASON, IN RORAIMA’S SAVANNAS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 13, n. 1, p. 41–48, 2012. DOI: 10.5216/cab.v13i1.12803. Disponível em: https://revistas.ufg.br/vet/article/view/12803. Acesso em: 22 nov. 2024.

Issue

Vol. 13 No. 1 (2012)

Section

Animal Production

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