Effect of dehydrated molasses with minerals and urea in pineapple straw silage.


  • Sofía Rodríguez-Chacón Dos Pinos-ELANCO, Costa Rica.
  • Michael López-Herrera Universidad de Costa Rica, Escuela de Zootecnia, Centro de Investigaciones en Nutrición Animal, San José, Costa Rica. rodolfo.wingching@ucr.ac.cr, augusto.rojas@ucr.ac.cr
  • Rodolfo WingChing-Jones Universidad de Costa Rica, Escuela de Zootecnia, Centro de Investigaciones en Nutrición Animal, San José, Costa Rica. augusto.rojas@ucr.ac.cr
  • Augusto Rojas-Bourillón Universidad de Costa Rica, Escuela de Zootecnia, Centro de Investigaciones en Nutrición Animal, San José, Costa Rica.




crude protein, agricultural byproducts, forage alternative, silage, ruminant nutrition, roughage.


The objective of this study was to determine the effect of urea and dehydrated molasses with minerals (DMM) on pineapple straw silage. The preparation of the straw was done from April to June, of 2010, and involved using the micro silage technique in 1kg bags. The treatments were performed using four levels of urea (0, 0.5, 1, 1.5% w/w), four DMM levels (0, 0.2, 0.4, 0.6% w/w) and a single concentration of bacterial inoculum (1 l/t) for all treatments. Results showed that DMM significantly increases the variables of pH (2.84 to 8.23) and ash (8.1 to 16.1% DM), but reduces in vitro digestibility (67.3 to 54.0%). Urea also affected significantly and proportionally pH, buffer capacity, ammonia nitrogen (NH3-TN) (3,87 to 7.10% NH3/TN) and crude protein (CP) (8.2 to 18.3% DM). Nonetheless these additives had no effect on dry matter and fiber content in ensiled materials. We conclude that the content of non-fibrous carbohydrates (NFC) rises when the level of DDM in silage is increased while urea has the opposite effect.


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AOAC (Association of Official Analytical Chemist). 1998. Official methods of analysis of AOAC International. 16th ed, 4th rev. Gaithersburg, MD: AOAC International, USA.

Azevêdo, J.A., S.C. Filho, E. Detmann, D. Pina, L.G. Pereira, K. De Oliveira, H. Fernandes, y N.K. Souza. 2011. Predição de frações digestíveis e valor energético de subprodutos agrícolas e agroindustriais para bovinos. Rev. Bras. Zootecnia 40:391-402.

Betancourt, M., I. González, y M. Martínez de Acurero. 2005. Evaluación de la calidad de los ensilajes. Revista Digital Centro Nacional de Investigaciones Agropecuarias de Venezuela. No 8 mayo-agosto. Maracay, Aragua, Venezuela. http://sian.inia.gob.ve/ repositorio/revistas_tec/ceniaphoy/articulos/n8/arti/ betancourt_m/betancourt_m.htm (Consultado 2 mayo 2014).

Belyea, R., B. Steevens, G. Garner, J. Whittier, y H. Sewell. 1996. Using NDF and ADF To Balance Diets. Missouri University Extension: G3161. USA.

Borges, J.A., Y. Bastardo, E. Sandoval, M. Barrios, y R. Ortega. 2011. Efecto de la adición de urea y el tipo de fermentación en la estabilidad de silajes de caña de azúcar (Saccharum spp.). Zootecnia Trop. 23:283- 291.

Chalupa, W., y C.J. Sniffen. 1996. Protein and amino acid nutrition of lactating dairy cattle – today and tomorrow. Anim. Feed Sci. Technol. 58:65-75.

Costa, R.G., M.X.C. Correia, J.H.V. Da Silva, A.N. De Medeiros, y F.F.R. De Carvalho. 2007. Effect of different levels of dehydrated pineapple by-products on intake, digestibility and performance of growing goats. Small Rumin. Res. 71:138-143.

Cubero J.F., A. Rojas, y R. Wing-Ching. 2010. Uso del inóculo microbial elaborado en finca en ensilaje de maíz (Zea mays). Valor nutricional y fermentativo. Agron. Costarricense 34(2):237-250.

Cunha, M.D.G., E. Oliveira, J.L. Ramos, y M.D. Alcântara. 2009. Conservação e utilização do resíduo de abacaxi na alimentação de ovinos no curimataú ocidental da paraíba. Tecnol. & Ciên. Agropec. 3(3):55-62.

Detmann E., y S.C. Filho. 2010. Sobre a estimação de carboidratos não fibrosos em alimentos e dietas. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 62(4):980-984.

Gutiérrez, F., A. Rojas, H. Dormond, M. Poore, y R. WingChing. 2003. Características nutricionales y fermentativas de mezclas ensiladas de desechos de piña y avícolas. Agron. Costarricense 27(1):79-89.

Hiriart, M. 2008. Ensilados. Procesamiento y calidad. Editorial Trillas, México.

Kellems, R.O., O. Wayman, A.H. Nguyen, J.C. Nolan, C.M. Campbell, J.R. Carpenter, y E.B. Ho-A. 1979. Post-harvest pineapple plant forage as a potential feedstuff for beef cattle: evaluated by laboratory analyses in vitro and in vivo digestibility and feedlot trials. J. Anim. Sci. 48:1040-1048.

Kleinschmit D.H., y L. Kung Jr. 2006. A meta-analysis of the effects of Lactobacillus buchneri on the fermentation and aerobic stability of corn and grass and small-grain silages. J. Dairy Sci. 89:4005-4013.

Lallo, F.H., I. Nunes, W. Gonçalves, L.M. Zeoula, F. Barros, y F. Yoshimi. 2003. Níveis de substitução da silagem de milho pela silagem de resíduos industriais de abacaxi sobre a degradabilidade ruminal em bovinos de corte. R. Bras. Zootec. 32:719-726.

López, M., R. WingChing-Jones, y A. Rojas. 2009. Características fermentativas y nutricionales del ensilaje de rastrojo de piña (Ananas comosus). Agron. Costarricense 33(1):1-15.

Lousada, J.E., J. Miranda, N. Rodríguez, J.C. Machado, y R. Braga. 2005. Consumo e digestibilidade de subprodutos do processamento de frutas em ovinos. R. Bras. Zootec. 34:659-669.

McDonald, P. 1981. The biochemistry of silage. New York, USA, Wiley.

McDonald, P., y A.R. Henderson. 1962. Buffering capacities of herbage samples as factor of silage. J. Sci. Food Agric. 13:395-400.

Moharrery, A. 2007. The determination of buffering capacity of some ruminant`s feedstuffs and their cumulative effects on TMR ration. American J. Anim. Vet. Sci. 2:72-78.

Moore, K.J., y M.A. Peterson. 1995. Post-harvest physiology and preservation of forages. Crop Science Society of America Inc. Special publication N.º 22. Wisconsin, USA.

Moreno, A.H. 1977. Evaluación de ensilajes de pasto Panamá (Saccharum sinense), para la alimentación de vacas de doble propósito. Tesis de maestría, Turrialba, Costa Rica, Universidad de Costa Rica-Centro Agronómico Tropical de Investigación y Enseñanza.

NRC (National Research Council). 2001. Nutrient Requirements of dairy cattle. 7 ed. National Academy Press, Washington DC., USA.

Otagaki, K., P. Lofgreeng, E. Cobb, y G. Dull. 1961. Net energy of pineapple bran and pineapple hay when fed to lactating dairy cows. J. Dairy Sci. 44:491-497.

Peña, P.M., y P. Del Pozo. 1992. Explotación de pastos y forrajes. ISCAH, La Habana, Cuba.

Pereira, E.S., J.G. Filho, E.R. Freitas, J.N. Neiva, y M.J. Cândido. 2009. Valor energético de subprodutos da agroindústria brasileira. Arch. Zootecn. 58:455-458.

Prado, I., F.H. Lallo, L.M. Zeoula, S. Neto, W. Gonçalves, y J. Marques. 2003. Níveis de substitução da silagem de milho pela silagem de resíduos industriais de abacaxi sobre el desempenho de bovinos confinados. R. Bras. Zootec. 32:737-744.

Rogério, M.C.P., I. Borges, J.N.M. Neiva, N.M. Rodriguez, J.C.M. Pimentel, G.A. Martins, T.P. Ribeiro, J.B. Costa, S.F. Santos, y F.C. Carvalho. 2007. Valor nutritivo do resíduo da indústria processadora de abacaxi (Ananas comosus L.) em dietas para ovinos. Consumo, digestibilidade aparente e balanços energético e nitrogenado. Arq. Bras. Med. Vet. Zootec. 59:773-781.

Sánchez, J. 2010. Práctica en el Programa de Transferencia Tecnológica de la Cooperativa de Productores de Leche Dos Pinos R.L. Ciudad Quesada, San Carlos. Práctica de Bachillerato, Universidad de Costa Rica, Costa Rica.

Sánchez, J.M., y H. Soto. 1998. Estimación de la calidad nutricional de los forrajes del cantón de San Carlos. II. Componentes de la pared celular. Revista Nutrición Animal Tropical 4(1):7-19.

SAS Institute. 2003. SAS 9.1.3 for Windows. Service Pack 4.Win_Pro plataforma. SAS Inst., Cary, NC, USA.

Taiwo A.A., E.A. Adebowale, J.F. Greenhalgh, y A.O. Akinsoyinu. 1995. Techniques for trapping ammonia generated from urea treatment of barley straw. Anim. Feed Sci. Tech. 56:133-141.

Tilley, J.M.A., y R.A. Terry. 1963. A two-stage technique for the In vitro digestion of forage crops. Grass Forage Sci. 18:104-111.

Tobia, C., A. Rojas, E. Villalobos, H. Soto, y L. Uribe. 2004. Sustitución parcial del alimento balanceado por ensilaje de soya y su efecto en la producción y calidad de la leche de vaca, en el trópico húmedo de Costa Rica. Agron. Costarricense 28(2):27-35.

Van Soest, P.J., y J.B. Robertson. 1985. Analysis of forages and fibrous food. AS 613. Cornell University, A Laboratory Manual. Department of Animal Science. Ithaca NY.

Weiss, W.P. 2004. Fine-tuning energy calculations. En: M. Eastridge, editor, Proceedings of the Tri-State Dairy Nutrition Conference. Purdue University, Michigan State University, Ohio State University. April 27 – 28. Fort Wayne, Indiana, United States. p. 131-142.

Yan, T., y R.E. Agnew. 2004a. Prediction of nutritive values in grass silages: I. Nutrient digestibility and energy concentrations using nutrient compositions and fermentation characteristics. J. Anim. Sci. 82:1367- 1379.

Yan, T., y R.E. Agnew. 2004b. Prediction of nutritive values in grass silages: II. Degradability of nitrogen and dry matter using digestibility, chemical composition and fermentation data. J. Anim. Sci. 82:1380-1391.



How to Cite

Rodríguez-Chacón, S., López-Herrera, M., WingChing-Jones, R., & Rojas-Bourillón, A. (2014). Effect of dehydrated molasses with minerals and urea in pineapple straw silage. Agronomía Mesoamericana, 25(2), 313–321. https://doi.org/10.15517/am.v25i2.15438

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