STRUCTURE AND PRODUCTIVITY OF TANZANIA GRASS SUBJECTED TO DIFFERENT DEFOLIATION FREQUENCIES

Authors

  • Vitor Hugo Maués Macedo Universidade Federal do Pará
  • Antônio Marcos Quadros Cunha Universidade Federal do Pará
  • Ebson Pereira Cândido Universidade Federal Rural da Amazônia
  • Felipe Nogueira Domingues Universidade Federal do Pará
  • Deyvid de Menezes Melo Universidade Federal Rural da Amazônia
  • Aníbal Coutinho do Rêgo Universidade Federal Rural da Amazônia

DOI:

https://doi.org/10.1590/cab18038984

Keywords:

Animal Nutrition

Abstract

The objective of the present study was to evaluate the effect of different frequencies of defoliation at fixed periods on the structural and productive characteristics of Tanzania grass (Panicum maximum) under Am climate conditions in 2014. The experimental design was in complete randomized blocks with six treatments corresponding to six frequencies of defoliation (14, 21, 28, 35, 42, and 49 days) and five repetitions. The data was submitted to regression analysis. The light interception (LI) increased (P <0.05) in an asymptotic way with increasing rest periods. The maximum light interception was 98% and occurred at 42 days of regrowth. The leaf area index (LAI) and the dry matter accumulation increased (P <0.05) linearly varying from 3.6 to 7.1 and from 880.3 to 4051.7 kg.ha-1 of forage dry matter in the frequencies 14-49 days, respectively. The height ranged 44-119 cm at frequencies 14-49 days, respectively. The frequency of defoliation at 95% LI is related to the rest period of 29 days, where the Tanzania grass canopy presented around 63 cm height, critical LAI of 5.1, and forage dry matter accumulation of 2,160 kg ha-1. 
Keywords: canopy; dry matter; leaf area; light interception; Panicum maximum.

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Author Biographies

Vitor Hugo Maués Macedo, Universidade Federal do Pará

Programa de Pós-graduação em Ciencia Animal

Antônio Marcos Quadros Cunha, Universidade Federal do Pará

Programa de Pós-graduação em Ciencia Animal

Ebson Pereira Cândido, Universidade Federal Rural da Amazônia

Universidade Federal Rural da Amazônia - Campus Capanema

Felipe Nogueira Domingues, Universidade Federal do Pará

Faculdade de Medicina Veterinária

Deyvid de Menezes Melo, Universidade Federal Rural da Amazônia

Graduação em Zootecnia

Aníbal Coutinho do Rêgo, Universidade Federal Rural da Amazônia

Institudo da Saúde e Produção Animal

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Published

2017-03-31

How to Cite

MACEDO, V. H. M.; CUNHA, A. M. Q.; CÂNDIDO, E. P.; DOMINGUES, F. N.; MELO, D. de M.; DO RÊGO, A. C. STRUCTURE AND PRODUCTIVITY OF TANZANIA GRASS SUBJECTED TO DIFFERENT DEFOLIATION FREQUENCIES. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 18, 2017. DOI: 10.1590/cab18038984. Disponível em: https://revistas.ufg.br/vet/article/view/e-38984. Acesso em: 17 jul. 2024.

Issue

Vol. 18 (2017): Continuous publication

Section

ZOOTECNIA

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