Productivity and nutritional value of elephant grass BRS Kurumi subjected to different proportions of defoliation
Abstract
The objective of this paper was to evaluate productivity, nutritional value of forage and tillering of elephant grass cv. BRS Kurumi under different pre-defoliation and post-defoliation canopy heights (residual height). The experimental design consisted in a randomized complete block design, with four replications. Treatments corresponded to the factorial combination of two pre‐defoliation heights (60 and 80 cm) and three post-defoliation residue heights (10, 25 and 40 cm), combined in factorial design 2 x 3, being, respectively, 60 x 10 cm; 60 x 25 cm; 60 x 40 cm; 80 x 10 cm; 80 x 25 cm; 80 x 40 cm. Productive, bromatological, carbohydrate fractionation and in situ degradability characteristics were evaluated. Results indicated that if the objective is to seek short intervals between grazing, associated with higher forage quality, the 60 x 25, 60 x 40 and 80 x 40 managements are the most indicated ones. For maximum forage productivity, 80 x 10 and 80 x 25 are the most recommended ones. For tillering, a canopy height management of 80 cm is preferred, with 80 x 25 for aerial tillers and 80 x 40 for basal tillers.
Downloads
References
ARAÚJO, S. A. C. et al. Produção de matéria seca e composição bromatológica de genótipos de capim- elefante anão. Archivos de Zootecnia, v. 60, n. 229, p. 83-91, 2011. https://doi.org/10.4321/S0004-05922011000100010.
CABALLERO, R. et al. Carbohydrate and protein fractions of fresh and dried Common Vetch a three maturity stages. Agronomy Journal, v. 93, n. 5, p. 1006-1013, 2001. https://doi.org/10.2134/agronj2001.9351006x.
CABRAL, L. S. et al. Frações de carboidratos de alimentos volumosos e suas taxas de degradação estimadas pela técnica de produção de gases. Revista Brasileira de Zootecnia, v. 29, p. 2087-2098, 2000.
CHAVES, C. S. et al. Forage production of elephant grass under intermittent stocking. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 2, p. 234-240, 2013. https://doi.org/10.1590/S0100-204X2013000200015.
COSTA, N. de L. et al. Eficiência do Nitrogênio, Produção de Forragem e Morfogênese do Capim-Massai sob Adubação. Nucleus, v.13, n. 2, p. 31-40, 2016. https://doi.org/10.3738/1982.2278.1695.
FERNANDES, P. B. et al. Acúmulo de forragem e densidade de perfilhos em pastos de capim-elefante anão submetidos à lotação intermitente, In: Reunião da Sociedade Brasileira de Zootecnia, 47, Salvador, 2011. Proceedings… Salvador: Sociedade Brasileira de Zootecnia, 2011.
GOMIDE, C. A. M. et al. Morphogenesis of dwarf elephant grass clones in response to intensity and frequency of defoliation in dry and rainy seasons. Revista Brasileira de Zootecnia, v. 40, n. 7, p. 1445-1451, 2011. https://doi.org/10.1590/S1516-35982011000700007.
HALL, M. B. Challenges with non-fiber carbohydrate methods 1 2. Journal of animal science, v.81, n. 12, p.226-3232. 2003. https://doi.org/10.2527/2003.81123226x.
LIMA, C. L. D. de. et al. Canopy Structure and Tillering of Piatã and Marandu Grasses under Two Grazing Intensities with Sheep. Bioscience Journal, v. 33, p. 135-142, 2017. https://doi.org/10.14393/BJ-v33n1a2017-33943.
MADEIRO, A. S. et al. Qualidade da forragem de clones de capim-elefante de porte baixo sob lotação rotacionada. In: Reunião Anual da Sociedade Brasileira de Zootecnia, 47., 2010, Salvador. Proceedings… Salvador: SBZ, 2010.
MORENO, J. A. Clima do Rio Grande do Sul. Porto Alegre: Secretaria da Agricultura. RS. 1961. 41p.
MORENZ, D. A. et al. Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period. Semina. Ciências Agrárias. v. 38, n. 6, p. 3817-3827, 2017. https://doi.org/10.5433/1679-0359.2017v38n6p3817.
MINSON, D. J. Forage in ruminant nutrition. San Diego: Academic Press, 1990. 483 p.
PACIULLO, D. S. C. et al. Características do pasto e desempenho de novilhas leiteiras em pastagem de capim-elefante cv. BRS Kurumi. Embrapa Gado de Leite - Boletim de Pesquisa e Desenvolvimento n. 35 (INFOTECA-E), 2015. 19p.
PEREIRA, A.V.; LÉDO, F. J. S.; MACHADO, J. C. BRS Kurumi and BRS Capiaçu - New elephant grass cultivars for grazing and cut-and-carry system. Crop Breeding and Applied Biotechnology, v.17, n. 1, p. 59-62, 2017. https://doi.org/10.1590/1984-70332017v17n1c9.
RIGUEIRA, J. P. S. et al. Fermentative profile and nutritional value of elephant grass silage with different levels of crude glycerin. Semina: Ciências Agrárias, v. 39, n. 2, p. 833-844, 2018. https://doi.org/10.5433/1679-0359.2018v39n2p833.
RUPOLLO, C. Z.et al. Produção e qualidade de capim elefante anão no terceiro ano de produção. In: XXI Seminário de Iniciação Científica. Proceedings… Ijuí, RS, 2013.
STRECK, E. V. et al. Solos do Rio Grande do Sul. UFRGS: EMATER/RS-ASCAR. 2008. 222 p.
SAMPAIO, R. L. et al. The nutritional interrelationship between the growing and finishing phases in crossbred cattle raised in a tropical system. Tropical Animal Health and Production, v. 49, p. 1015-1024, 2017. https://doi.org/10.1007/s11250-017-1294-8.
SANTOS, F. A. P. et al. Aspectos econômicos, sociais e ambientais da produção de leite a pasto. In: Alternativas para produção sustentável de leite na Amazônia. Brasília: Embrapa, p. 277-292, 2013.
SENGER, C. C. et al. Evaluation of autoclave procedures for fibre analysis in forage and concentrate feedstuffs. Animal Feed Science and Technology, v. 146, p. 169-174. 2008. https://doi.org/10.1016/j.anifeedsci.2007.12.008.
SILVA, S. C. da; NASCIMENTO JÚNIOR., D. do. Avanços na pesquisa com plantas forrageiras tropicais em pastagens: características morfofisiológicas e manejo do pastejo. Revista Brasileira de Zootecnia, v. 36, p. 121-138, 2007. https://doi.org/10.1590/S1516-35982007001000014.
SILVA, S. C. da et al. Tillering dynamics of Mulato grass subjected to strategies of rotational grazing management. Journal of Agricultural Science, v.155, p.1082-1092, 2017. https://doi.org/10.1017/S0021859617000223.
SCHEIBLER, R. B. Avaliação produtiva, nutricional e formas de utilização da forrageira Pennisetum purpureum (Schumach) cv. BRS Kurumi. 2018. 105p. Tese (Doutorado em Ciências) – Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, Pelotas, RS, Brasil. 2018.
SNIFFEN, C. J. et al. A net carbohydrate and protein system for evaluating cattle diets: II. Carbohydrate and protein availability. Journal of Animal Science, v. 70, n. 11, p. 3562-3577, 1992. https://doi.org/10.2527/1992.70113562x.
VALADARES FILHO, S. C. et al. Cálculo de exigências nutricionais, formulação de dietas e predição de desempenho de zebuínos puros e cruzados. BR-CORTE. 3. ed. Viçosa: UFV, 2016.
VAN SOEST, P. J.; ROBERTSON, J. B.; LEWIS, B. A. Methods for dietary fiber, neutral detergent fiber, and non-starch polysaccharides in relation to animal nutrition. Journal of dairy science, v.74, n. 10, p. 3583-3597, 1991. https://doi.org/10.3168/jds.S0022-0302(91)78551-2.
VAN SOEST, P. J. Nutritional ecology of the ruminant. 2 ed. Ithaca, New York: Cornell University Press, 1994. 476 p.
WHITEHOUSE, N. L. et al. Improved techniques for dissociating particle-associated mixed ruminal microorganisms from ruminal digesta solids. Journal of animal science, v. 72, n. 5, p. 1335-1343, 1994. https://doi.org/10.2527/1994.7251335x.
ZAILAN, M. Z.; YAAKU, H.; JUSOH, S. Yield and nutritive value of four Napier (Pennisetum purpureum) cultivars at different harvesting ages. Agriculture and Biology Journal of North America, v. 7, n. 5, p. 213-219, 2016.
Copyright (c) 2023 Pesquisa Agropecuária Gaúcha
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The authors declare that the work has not been previously published, nor sent simultaneously for publication in another journal and that they agree with the submission, content and transfer of the publication rights of the article in question to the scientific journal Pesquisa Agropecuária Gaúcha - PAG. The authors assume full responsibility for the originality of the article, and may incur on them any charges arising from claims by third parties in relation to the authorship of the article. The full reproduction of the journal's articles in other free-to-use electronic media is permitted under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.
