Forage yield and morphogenesis of Megathyrsus maximus cultivars in Roraimas’s savannas
DOI:
https://doi.org/10.33448/rsd-v9i8.6054Keywords:
Green dry matter; Leaves; Senescence; Tillering; Productivity.Abstract
In order to evaluate the forage productivity and the morphogenic and structural characteristics of Megathyrsus maximus cultivars (Massai, Mombasa, Kenya, Tamani, Tanzania and Zuri), an experiment was conduct under natural environmental conditions in the savannahs of Roraima. The highest yields of green dry matter (GDM) were found with cultivars Zuri (4,317 kg ha-1) and Mombasa (4,115 kg ha-1), followed by Kenya (3,868 kg ha-1) and Tamani (3,755 kg ha-1), while Massai (3,341 kg ha-1) and Tanzania (3,225 kg ha-1) were the least productive. GDM yield was directly correlated with LAI and inversely proportional to tiller population density (TPD). The cultivars Tanzania and Kenya had the highest number of tiller leaves and leaf appearance rates, while the highest leaf expansion rates were estimate in cultivars Zuri and Kenya. The highest average length of tiller leaves was estimate in the cultivars Zuri and Mombasa. Leaf senescence rates were inversely proportional to TPD and the highest recorded with the cultivars Mombasa and Tamani. The six cultivars of M. maximus showed satisfactory forage yields and can be recommend for cultivation in the edaphoclimatic conditions of the of Roraima’s savannas. The determination of morphogenic and structural characteristics can contribute to the establishment of appropriate and specific management practices for each cultivar, aiming to optimize its productivity and reduce losses due to leaf senescence.
References
Alexandrino, E., Cândido, M. J. D., & Gomide, J. A. (2011). Fluxo de biomassa e taxa de acúmulo de forragem em capim Mombaça mantido sob diferentes alturas. Revista Brasileira de Saúde e Produção Animal, 12, 59-71. https://doi.org/www.rbspa.ufba.br
Cavalli, J. (2016). Estratégias de manejo do pastejo para Panicum maximum cvs. Quênia e Tamani. Cuiabá: Universidade Federal de Mato Grosso. 96. (Dissertação de Mestrado em Zootecnia).
Costa, N. L., Jank, L., Magalhães, J. A., Bendahan, A. B., Rodrigues, B. H. N., & Santos, F. J. S. (2020). Morphogenetic and structural characteristics of Megathyrsus maximus cv. Centenário under defoliation intensities. Research, Society and Development, 9, 1-13, e120953284. https://dx.doi.org/10.33448/rsd-v9i5.32841
Costa, N. L., Moraes, A., Monteiro, A. L. G., & Motta, A. C. V. (2013). Forage productivity and morphogenesis of Axonopus aureus under nitrogen fertilization. Revista Brasileira de Zootecnia, 42, 541-548. https://doi.org/10.1590/S1516-35982013000800002
Difante, G. S., Nascimento Júnior, D., Silva, S. C., Euclides, V. P. B., & Montagner, D. B. (2011). Características morfogênicas e estruturais do capim-marandu submetido a combinações de alturas e intervalos de corte. Revista Brasileira de Zootecnia, 40, 955-963. http://dx.doi.org/10.1590/S1516-35982011000500003
Ferreira, D. F. (2011). SISVAR: A Computer Statistical Analysis System. Ciência e Agrotecnologia, 35, 1039-1042. http://dx.doi.org/10.1590/S1413-70542011000600001
Gastal, F., & Lemaire, G. (2002). N uptake and distribution in crops: an agronomical and ecophysiological perspective. Journal of Experimental Botany, 53, 789-799. https://doi.org/10.1093/jexbot/53.370.789
Garcez Neto, A., Nascimento Júnior, D., & Regazzi, A. J. (2002). Respostas morfogênicas e
estruturais de Panicum maximum cv. Mombaça sob diferentes níveis de adubação nitrogenada
e alturas de corte. Revista Brasileira de Zootecnia, 31, 1890-1900.
https://doi.org/10.1590/S1516-35982002000800004
Nabinger, C., & Carvalho, P. F. C. (2009). Ecofisiología de sistemas pastoriles: aplicaciones para su sustentabilidad. Agrociencia, 13, 18-27.
Lemaire, G., Hodgson, J., & Chabbi, A. (2011). Grassland productivity and ecosystem services (Vol. 1). Cabi. 287p.
Macedo, C. H. O., Alexandrino, E., Jakelaitis, A., Vaz, R. G. M. V., Reis, R. H. P., & Vendrusculo, J. (2010). Características agronômicas, morfogênicas e estruturais do capim" Panicum maximum" cv. Mombaça sob desfolhação intermitente. Revista Brasileira de Saúde e Produção Animal, 11, 941-952. http://mc04.manuscriptcentral.com/rbspa-scielo2009
Miquilini, M. (2019). Caracterização morfogênica de cultivares de Brachiaria spp. e Panicum spp. Piracicaba: ESALQ. 62p. (Dissertação de Mestrado em Agronomia).
Nabinger, C., & Pontes, L. S. (2002). Manejo da desfolha. Simpósio Sobre Manejo da Pastagem, Piracicaba: ESALQ. 133-158.
Pereira, V. V. (2013). A importância das características morfogênicas sobre o fluxo de tecidos no manejo de pastagens tropicais. Revista em Agronegócio e Meio Ambiente, 6, 289–309.
Pereira, A. S., Shitsuka, D. M., Pereira, F. J., & Shitsuka, R. (2018). Metodologia da pesquisa
científica. [e-book]. Santa Maria. Ed. UAB/NTE/UFSM. Disponível em: https://repositorio.ufsm.br/bitstream/handle/1/15824/Lic_Computacao_MetodologiaPesquisa-Cientifica.pdf?sequence=1. Acesso em: 15 jun. 2020
Pontes, L. S., Carvalho, P. C. F., Nabinger, C., & Soares, A. B. (2004). Fluxo de biomassa em pastagem de azevém anual (Lolium multiflorum Lam.) manejada em diferentes alturas. Revista Brasileira de Zootecnia, 33, 529-537. https://doi.org/10.1590/S1516-35982004000300002
Santos, M. R., Fonseca, D. M., Gomes, V. M., Silva, S. P., Silva, G. P., & Reis, M. (2012). Correlações entre características morfogênicas e estruturais em pastos de capim-braquiária. Ciência Animal Brasileira, 13(1), 49–56. https://doi.org/10.5216/cab.v13il.13401
Sarmiento, G., Silva, M. P., & Naranjo, M. E. 2006. Nitrogen and phosphorus as limiting for growth and primary production in the Venezuelan Llanos. Journal of Tropical Ecology, 22, 203-212. https://doi.org/10.1017/S0266467405003068
Souza, J. A. S. (2018). Produção de gramíneas forrageiras dos gêneros Urochloa e Megathyrsus nas condições edafoclimáticas de Manaus, AM. Manaus: Universidade Federal do Amazonas. 58p. (Dissertação de Mestrado em Agronomia).
Tesk, C. R. M., Cavalli, J., Pina, D. S., Pereira, D. H., Pedreira, C. G. S., Jank, L., Sollenberger, L. E. & Pedreira, B. C. (2020). Herbage responses of Tamani and Quênia guinea grasses to grazing intensity. Agronomy Journal, 201, 1-27. https://doi.org/10.1002/agj2.20189
Valote, P. D. (2018). Acúmulo de forragem e estrutura dos pastos das cultivares BRS Zuri e BRS Quênia (Megathyrsus maximus) sob manejo rotacionado. Rio de Janeiro: Universidade Federal Rural do Rio de Janeiro. 61p. (Dissertação de Mestrado em Zootecnia).
Veras, E. L. L., Difante, G. S., Gurgel, A. L. C., Costa, A. B. G., Rodrigues, J. G., & Costa, P. R. (2020). Tillering and structural characteristics of Panicum
cultivars in the Brazilian Semiarid Region. Sustainability, 12, 1-11. https://doi.org/10.3390/su12093849
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Copyright (c) 2020 Newton de Lucena Costa, Liana Jank Jank, Amaury Burlamaqui Bendahan, João Avelar Magalhães, Braz Henrique Nunes Rodrigues, Francisco José de Seixas Santos
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