Abstract
Two experiments were carried out in Syria with the purpose of investigating to which extent the effects of including 30 % olive cake (replacing parts of forage and concentrate) or tomato pomace (replacing concentrate) in the diet, described under controlled on-station conditions, can be recovered on farm. A total of 180 lactating Awassi ewes (three farms per experiment, 15 ewes per treatment) were fed either control diets or test feed diets over a period of 7 weeks. Milk yield was measured bi-weekly and milk composition was analysed for gross physicochemical composition and fatty acid (FA) profile. Both feeds reduced milk yield (−10 %) and milk protein content, whereas milk fat content was increased by tomato pomace. Both feeds resulted in similar changes in milk FA profile, namely less saturated and polyunsaturated FA and more monounsaturated FA including 18:1 trans FA. Tomato pomace and olive cake also resulted in increased n-6:n-3 FA ratios, while the proportion of the conjugated linoleic acids was not affected by either treatment. In conclusion, the response of the ewes on farm was clear and similar in nature for most of milk-related traits as that found on station, but lower in magnitude.
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Abbeddou, S., Rihawi, S., Iñiguez, L., Zaklouta, M., Hess, H.D. and Kreuzer, M., 2011a. Ruminal degradability, digestibility, energy content, and influence on nitrogen turnover of various Mediterranean by-products in fat-tailed Awassi sheep. Animal Feed Science and Technology, 163, 99–110.
Abbeddou, S., Rischkowsky, B.A., Richter, E.K., Hess, H.D. and Kreuzer, M., 2011b. Modification of milk fatty acid composition by feeding forages and agro-industrial by-products from dry areas to Awassi sheep. Journal of Dairy Science, 94, 4657–4668.
AOAC. 1997. Official Methods of Analysis. Association of Official Analytical Chemists, Arlington, VA.
Chilliard, Y., Glasser, F., Ferlay, A., Bernard, L., Rouel, J., and M. Doreau. 2007. Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fat. European Journal of Lipid Science and Technology, 109:828–855.
Chiofalo, B., Liotta, L., Zumbo, A. and Chiofalo, V., 2004. Administration of olive cake for ewe feeding: effect on milk yield and composition. Small Ruminant Research, 55, 169–176.
Council for International Organizations of Medical Sciences and the International Council for Laboratory Animal Science. 2012. International Guiding Principles for Biomedical Research Involving Animals. grants.nih.gov/grants/olaw/Guiding_Principles_2012.pdf (accessed on 21 August 2014).
DACH (German, Austrian and Swiss Societies of Nutrition) (2000). Referenzwerte für die Nährstoffzufuhr. Umschau Braus, Frankfurt/Main, Germany.
Faye, B., Konuspayeva, G., Narmuratova, M., Serikbaeva, A., Musaad, A.M. and Mehri, H., 2013. Effect of crude olive cake supplementation on camel milk production and fatty acid composition. Dairy Science and Technology, 93, 225–239.
Gómez-Cortés, P., Frutos, P., Mantecón, A.R., Juárez, M., de la Fuente, M.A. and Hervás, G., 2008. Addition of olive oil to dairy ewe diets: effect on milk fatty acid profile and animal performance. Journal of Dairy Science, 91, 3119–3127.
Hadjipanayiotou, M., 1999. Feeding ensiled crude olive cake to lactating Chios ewes, Damascus goats and Friesian cows. Livestock Production Science, 59, 61–66.
Hilali, M., Iñiguez, L., Knaus, W., Schreiner, M., Wurzinger, M., and Mayer, H.K., 2011. Dietary supplementation with nonconventional feeds from the Middle East: Assessing the effects on physicochemical and organoleptic properties of Awassi sheep milk and yogurt. Journal of Dairy Science, 94, 5737–5749.
Jutzeler van Wijlen, R.P. and Colombani, P.C., 2010. Grass-based ruminant production methods and human bioconversion of vaccenic acid with estimations of maximal dietary intake of conjugated linoleic acids. International Dairy Journal, 20, 433–448.
Molina-Alcaide, E. and Yáñez-Ruiz, D., 2008. Potential use of olive by-products in ruminant feeding: a review. Animal Feed Science and Technology, 147, 247–264.
Molina-Alcaide, E., Morales-García, E.Y., Martín-García, A.I., Ben Salem, H., Nefzaoui, A. and Sanz-Sampelayo, M.R., 2010. Effects of partial replacement of concentrate with feed blocks on nutrient utilization, microbial N flow, and milk yield and composition in goats. Journal of Dairy Science, 93, 2076–2087.
Romano, R., Masucci, F., Giordano, A., Musso, S.S., Naviglio, D., Santini A. 2010. Effect of tomato by-products in the diet of Comisana sheep on composition and conjugated linoleic acid content of milk fat. International Dairy Journal, 20, 858–862.
Romero-Huelva, M., Ramos-Morales, E. and Molina-Alcaide, E., 2012. Nutrient utilization, ruminal fermentation, microbial abundances, and milk yield and composition in dairy goats fed diets including tomato and cucumber waste fruits. Journal of Dairy Science, 95, 6015–6026.
SAS. 2009. SAS/STAT User’s Guide, version 9.2. SAS Institute, Cary, NC.
Taheri, M.R., Zamiri, M.J., Rowghani, E. and Akhlaghi, A., 2013. Effect of feeding olive-pulp ensiled with additives on feedlot performance and carcass attributes of fat-tailed lambs. Tropical Animal Health and Production, 45, 345–350.
Terramoccia, S., Bartocci, S., Taticchi, A., Di Giovanni, S., Pauselli, M., Mourvaki, E., Urbani, S. and Servil, M., 2013. Use of dried stoned olive pomace in the feeding of lactating buffaloes: Effect on the quantity and quality of the milk produced. Asian-Australasian Journal of Animal Science, 26, 971–980.
Tilley, J.M.A., Terry, R.A., 1963. A two-stage technique for the in vitro digestion of forage crops. Journal of the British Grassland Society, 18, 104–111.
Vargas-Bello-Pérez, E., Vera, R.R., Aguilar, C., Lira, R., Peña, I. and Fernández, J., 2013a. Feeding olive cake to ewes improves fatty acid profile of milk and cheese. Animal Feed Science and Technology, 184, 94–99.
Vargas-Bello-Pérez, E., Vera, R.R., Aguilar, C., Lira, R., Peña, I., Valenzuela, A. and Cerda, H., 2013b. Effect of dietary inclusion of lampante olive oil on milk and cheese fatty acid profiles of ewes. Grasas y Aceites, 64, 295–303.
Vasta, V., Nudda, A., Cannas, A., Lanza, M. and Priolo, A., 2008. Alternative feed resources and their effects on the quality of meat and milk from small ruminant. Animal Feed Science and Technology, 147, 223–246.
Vasta, V. and Luciano, G., 2011. The effects of dietary consumption of plants secondary compounds on small ruminants’ products quality. Small Ruminant Research, 101, 150–159.
Acknowledgments
Our thanks go especially to the farmers Abu Bakri, Abu Khaled, Dhirar Al Nassani, Fawaz, Mohamed Al Nassani and Said for participating in the present study with intensive and thorough work and being generous during the entire experiment. We thank Dr. Safouh Rihawi for his assistance in diet formulation, Monika Zaklouta for her assistance in coordinating the experiments, Ahmad Sawass for coordinating the milk sampling and Ali Al Jassim for supervising the feed mixing and distribution to the farms. We are grateful to all technicians and workers at ICARDA for their great help in the animal experiments and laboratory analyses.
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Abbeddou, S., Rischkowsky, B., Hilali, M.ED. et al. Supplementing diets of Awassi ewes with olive cake and tomato pomace: on-farm recovery of effects on yield, composition and fatty acid profile of the milk. Trop Anim Health Prod 47, 145–152 (2015). https://doi.org/10.1007/s11250-014-0699-x
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DOI: https://doi.org/10.1007/s11250-014-0699-x