Forage yield and morphogenesis of Brachiariabrizantha cv. Marandu under defoliation levels in Roraima´s savannas

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Claudio Ramalho Townsend
  • Fabíola Helena dos Santos Fogaça
  • João Avelar Magalhães
  • Francisco José de Seixas Santos
  • Braz Henrique Nunes Rodrigues

DOI:

https://doi.org/10.22256/pubvet.v10n4.302-306

Keywords:

dry matter, leaves, tillering, senescence

Abstract

The effect of defoliation levels (10, 15, 20, 25 and 30 cm above soil level) on dry matter (DM) yield and morphogenetic and structural characteristics of Brachiaria brizantha cv. Maranduwas evaluated under field conditions in Roraima´s savannas. The effects of defoliation levels on the DM yields, number of leaves/plant, medium blade length, leaf area index, leaf appearance and elongation rates were quadratics and maximum values recorded with cutting at 23.1; 18.6; 26.3; 24.1; 14.8 and 21.3 cm above soil level, respectively. The population tiller density was inversely proportional to the level of defoliation, while the opposite occurred for to leaf senescence rate. Apical meristem removing percentage was higher with increasing defoliation level. Aftermath regrowth showed close negative correlation with defoliation level.

Published

2016-03-02

Issue

Section

Pastagem e forragicultura

How to Cite

Forage yield and morphogenesis of Brachiariabrizantha cv. Marandu under defoliation levels in Roraima´s savannas. (2016). Pubvet, 10(04). https://doi.org/10.22256/pubvet.v10n4.302-306

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