Biomass turnover in brachiaria cultivars in a tropical environment

Authors

  • Cláudia de Paula Rezende Comissão Executiva do Plano da Lavoura Cacaueira
  • Thasia Martins Macedo Universidade Federal do Espirito Santo
  • José Marques Pereira Comissão Executiva do Plano da Lavoura Cacaueira
  • Ricardo Mazzotti Bellomi Universidade Federal da Bahia
  • Gleidson Giordano Pinto de Carvalho Universidade Federal da Bahia
  • Luis Gabriel Alves Cirne Universidade Federal de Roraima
  • Camila Maida de Albuquerque Maranhão Universidade estadual de Montes Claros

DOI:

https://doi.org/10.14393/BJ-v33n3-34686

Keywords:

Leaf enation, Phyllocladaceae, Phyllochron, Structure (Source: CAB thesaurus)

Abstract

The experiment was conducted to evaluate the morphogenetic traits of three Brachiaria cultivars (common, Llanero and Tupi) subjected to continuous grazing with variable stocking rate in the four seasons of the year. A randomized block design with five replicates was adopted. Tissue turnover evaluations were carried out in the summer, fall, winter and spring, with measurements taken every two days. Stem length and the length of each green leaf were measured. With these determinations, the following variables were calculated: stem elongation rate (cm/tiller/day), leaf elongation rate (cm/leaf/day), number of live leaves per tiller and phyllochron (days/leaf). The highest leaf appearance rate was obtained by Tupi grass in the summer, and the lowest by Llanero grass in the winter. The lowest phyllochron, 5.90 days/leaf, was obtained by Tupi grass in the winter, whereas in commercial cultivars Llanero and common the average phyllochron was 9.04 and 10.04 days/leaf, respectively. Because of the effect of the transition from the dry season to the beginning of rains in the summer, this was the period of greatest variations in results among the different cultivars. Llanero grass stood out for the highest values for plant, tiller and leaf lengths, resulting from greater stem and leaf elongation rates. Tupi grass had the worst performance of all cultivars.

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Published

2017-05-24

How to Cite

REZENDE, C. de P., MACEDO, T.M., PEREIRA, J.M., BELLOMI, R.M., CARVALHO, G.G.P. de, CIRNE, L.G.A. and MARANHÃO, C.M. de A., 2017. Biomass turnover in brachiaria cultivars in a tropical environment . Bioscience Journal [online], vol. 33, no. 3, pp. 644–651. [Accessed28 May 2022]. DOI 10.14393/BJ-v33n3-34686. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/34686.

Issue

Section

Agricultural Sciences