AVALIAÇÃO DE SISTEMAS ENERGÉTICOS PARA VACAS LEITEIRAS

Autores

DOI:

10.31413/nativa.v8i2.8440

Resumo

Objetivou-se avaliar a qualidade da predição das exigências de energia para vacas leiteiras do sistema de Oliveira (2015) para condições tropicais, em comparação aos sistemas AFRC (1993), NRC (2001), Feed into Milk (THOMAS, 2004), INRA (2007), CSIRO (2007) e Moraes et al. (2015). Utilizou-se observações de quatro experimentos de alimentação de vacas leiteiras do tipo rotativo, totalizando 181 observações de consumo de nutrientes digestíveis totais (NDT) de 16 dietas experimentais. O conjunto de dados construídos apresentou uma ampla variação nas características dos animais (produção de leite entre 6,1 a 36,5 kg/dia), dieta e consumo de NDT (4,0 a 16,6 kg/dia). O sistema energético de Oliveira (2015) explicou 83% do consumo de NDT observado, superestimou o consumo de NDT em média 0,35 kg/dia e apresentou raiz quadrada do erro médio de predição (RQEMP) de 12,2% do valor observado. Os sistemas AFRC (1993), NRC (2001), Feed into Milk (THOMAS, 2014) e Moraes et al (2015) apresentaram RQEMP similares (P > 0,05) ao sistema de Oliveira (2015), indicando similaridade na acurácia para predizer as exigências de energia para vacas leiteiras em condições tropicais. Recomenda-se ainda investigar a adequação destes sistemas energéticos em experimentos de longa duração.

Palavras-chave: acurácia; energia; sistemas nutricionais.

 

EVALUATION OF ENERGETICS SYSTEMS FOR DAIRY COWS

 

ABSTRACT: The objective was evaluate accuracy and precision of the estimated energy requirements for lactating dairy of the Oliveira (2015) system to tropical condition, compared to AFRC (1993), NRC (2001), Feed into Milk (THOMAS, 2004), INRA (2007), CSIRO (2007) and proposed by Moraes et al. (2015). Four rotative feeding trials were used as dataset, totalizing 181 observations of total digestible nutrient (TDN) intake from 16 diets. Dataset had wide variation in animal performance (milk yield between 6.1 to 36.5 kg/day), diet and TDN intake (4.0 to 16.6 kg/day). The Oliveira (2015) system explained 83% of the observed TDN intake, over-predicted TDN intake by 0.34 kg/day and presented root mean square error of prediction (RMSPE) of the 12.2% of the observed TDN intake. AFRC (1993), NRC (2001), Feed into Milk (THOMAS, 2014) e Moraes et al (2015) systems had similar RMSPE (P > 0.05) to Oliveira (2015) system, indicating similar accuracy to predict energy requirement for dairy cows under tropical conditions. We recommended to investigate the adequacy these systems in long term feeding trials.

Keywords: accuracy; energy; nutritional systems.

Referências

AFRC_AGRICULTURAL AND FOOD RESEARCH COUNCIL. Energy and protein requirements of ruminants. AFRC Technical Committee on Responses to Nutrients. Wallingford: CAB Jnt, 1993. 159 p.

AGNEW, R. E.; YAN, T.; MURPHY, J. J.; FERRIS, C. P.; GORDON, F. J. Development of maintenance energy requirement and energetic efficiency for lactation from production data of dairy cows. Livestock Production Science, Amsterdam, v. 82, n. 2-3, p. 151–162, 2003. DOI: https://dx.doi.org/10.1016/S0301-6226(03)00014-9

ALEXANDRATOS, N.; BRUINSMA, J. Agricultural Development Economics Division. Food and Agriculture Organization of the United Nations. World Agriculture Towards 2030/2015. The 2012 Revision. (ESA Working Paper No. 12-03).

BAUMAN, D. E.; CURRIE, W. B. Partitioning of nutrients during pregnancy and lactation: a review of mechanisms involving homeostasis and homeorhesis. Journal of Dairy Science, Champaign, v. 63, n. 9, p. 1514–1529, 1980. DOI: https://dx.doi.org/10.3168/jds.S0022-0302(80)83111-0

BIBBY, J. D.; TOUTENBURG, H. Prediction and improved estimation in linear models. Berlin: John Wiley & Sons, 1977. 201 p.

CSIRO_COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANIZATION. Feeding Standards for Australian Livestock. Ruminants. Melbourne: CSIRO Publishing, 2007. 266 p.

INRA_INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE. Alimentation des Bovins, Ovins, et Caprins. Paris: Quae, 2007. 307 p.

MOE, P. W.; TYRRELL, H. F.; FLATT, W. P. Energetics of body tissue mobilization. Journal of Dairy Science, Champaign, v. 54, n. 4, p. 548-553, 1971. DOI: https://dx.doi.org/10.3168/jds.S0022-0302(71)85886-1

MORAES, L. E.; KEBREAB, E.; STRATHE, A. B.; DIJKSTRA, J.; FRANCE, J.; CASPER, D. P.; FADEL, J. G. Multivariate and univariate analysis of energy balance data from lactating dairy cows. Journal Dairy Science, Champaign, v. 98, n. 6, p. 4012–4029, 2015. DOI: https://dx.doi.org/10.3168/jds.2014-8995.

MOURA, D. C.; VIEIRA, F. J. G.; MIRANDA, R. M.; CORDEIRO, P. O.; MOLOSSI, L.; SOUZA, D. S.; ZAMPIERI, V. H.; SOARES, S. R.; VIANA, F. N.; ALESSI, K. C.; OLIVEIRA, A. S. Crambe meal can completely replace soybean mean in diets for dairy cows. Journal Dairy Science, Champaign, v. 101, Suplemento 2, p. 309-309, 2018.

NRC_NATIONAL RESEARCH COUNCIL. Nutrient Requirements of Dairy Cattle. 7. ed. Washington: National Academy Press, 2001. 381 p.

NorFor_NORDIC FEED EVALUATION SYSTEM. The Nordic feed evaluation system. 30. ed. Wageningen: Wageningen Academic Publishers, 2011. 130 p.

OLIVEIRA, A. S. Energy requirement system for dairy cows under tropical condition. Proceedings Australian Society of Animal Production, v. 30, p. 182, 2014.

OLIVEIRA, A. S. Meta-analysis of feeding trials to estimate energy requirements of dairy cows under tropical condition. Animal Feed Science and Technology, Amsterdam, v. 210, p. 94-103, 2015. DOI: https://dx.doi.org/10.1016/j.anifeedsci.2015.10.006

OLIVEIRA, A. S.; CAMPOS, J. M. S.; VALADARES FILHO, S. C.; ASSIS, A. J. D. U.; TEIXEIRA, R. M. A. U.; VALADARES, R. F. D.; OLIVEIRA, G. S. D. U. Substituição do milho por casca de café ou de soja em dietas para vacas leiteiras: consumo, digestibilidade dos nutrientes, produção e composição do leite. Revista Brasileira de Zootecnia, Viçosa, v. 36, n. 4, p. 1172-1182, 2007. DOI: https://dx.doi.org/10.1590/S1516-35982007000500026.

OLIVEIRA, A. S.; CAMPOS, J. M. S.; OGUNADE, I. M.; CAIXEITA, D. S.; VIANA, E. P.; ALESSI, K. C. Performance and utilization of nutrients in dairy cows fed with sunflower meal. The Journal of Agriculture Science, Cambridge, v. 156, p. 1233-1240, 2019. DOI: https://doi.org/10.1017/S0021859619000091

SOUZA, J. G.; OLINI, L. M. G.; ARAUJO, C. V. MENDONÇA, S.; ZERVOUDAKIS, J. T.; CABRAL, L. S.; OLIVEIRA, A. S. Performance, hepatic function and efficiency of nutrient utilization of grazing dairy cows supplemented with alkaline-treated Jatropha Curcas L. meal. Animal Production Science, v. 58, n. 12, p. 2280-2287, 2018. DOI: https://dx.doi.org/10.1071/AN16717. 2017

STOCK, L. A.; CARNEIRO, A. V.; CARVALHO, G. R. ZOCCAL, R.; MARTINS, P. C.; YAMAGUCHI, L. C. T. Brazilian milk production systems and its representativeness. 2007. p. 1-6. Disponível em: . Acessado em: 26 de Setembro de 2019.

THOMAS, C. Feed into milk: A new applied feeding system for dairy cows: An advisory manual. Nottingham: Nottingham University Press, 2004. 68 p.

VIEIRA, F. J. G. Fatores que afetam o consumo de matéria seca de vacas leiteiras. 2017. 81f. Dissertação (Mestrado em Zootecnia) – Instituto de Ciências Agrárias e Ambientais, Universidade Federal do Mato Grosso, Sinop, 2017.

Downloads

Publicado

2020-04-10

Como Citar

Batista, G. F. do N., Oliveira, M. R. C., Moura, D. C. de, Souza, J. G. de, Silva, H. M. da, Gallardo, W. B., Donadia, A. B., & Oliveira, A. S. de. (2020). AVALIAÇÃO DE SISTEMAS ENERGÉTICOS PARA VACAS LEITEIRAS. Nativa, 8(2), 280–288. https://doi.org/10.31413/nativa.v8i2.8440

Edição

Seção

Zootecnia / Animal Husbandry

Artigos mais lidos pelo mesmo(s) autor(es)