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Milk production in dairy goats supplemented with different levels of ruminally protected methionine

  • Erick Alonso-Mélendez (a1), Germán D. Mendoza (a2), Francisco A. Castrejón-Pineda (a1) and Andrés E. Ducoing-Watty (a1)

The objective of the study reported in this Research Communication was to evaluate graded levels of ruminally protected methionine (RPM) in dairy goat rations on milk production and live weight changes during 155 d of lactation. Twenty-five primiparous dairy goats (crosses of Toggenburg, French Alpine and Saanen; 45·4 ± 1·0 kg BW) were fed a basal diet (10·10% CP, 6·13 DP and 2·34 Mcal/kg ME) of corn silage, oat hay, alfalfa hay and concentrate (80% forage, 20% concentrate). After kidding, the treatments, which consisted of four oral doses of ruminally protected methionine (RPM) at 0, 1, 2 and 3 g/d, were randomly assigned to the goats. The experiment was conducted for 110 d with measurements of milk production and composition, body weight and dry matter intake. No treatment effects were detected in milk production and composition. However, goats with RPM showed a positive live weight changes during lactation which were improved as dose was increased (linear P < 0·01) whereas goats without RPM showed weight loss during the experiment.

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Al-Qaisi, MA & Titi, HH 2014 Effect of rumen-protected methionine on production and composition of early lactating Shami goats milk and growth performance of their kids. Archiv Tierzucht 57 111
AOAC 1999 Official Methods of Analysis, 16th edn. Arlington, VA, USA: Association of Official Analytical Chemists
Flores, A, Mendoza, G, Pinos-Rodríguez, JM, Plata, F, Vega, S & Bárcena, R 2009 Effects of rumen-protected methionine on milk production of dairy goats. Italian Journal of Animal Science 8 271275
Harpaz, S 2005 L-carnitine and its attributed functions in fish culture and nutrition. A review. Aquaculture 249 321
Kikusato, M, Sudo, S & Toyomizu, M 2015 Methionine deficiency leads to hepatic fat accretion via impairment of fatty acid import by carnitine palmitoyltransferase I. British Poultry Science 56 225231
Konyali, A, Sitki, B & Yurdabak, S 2010 Effect of estrus synchronization on dairy goat milk composition. African Journal of Agricultural Research 5 681684
Lara, A, Mendoza, GD, Landois, LA, Bárcena, R, Sánchez, T, Rojo, R, Ayala, J & Vega, S 2006 Milk production in Holstein cows supplemented with different levels of ruminally protected methionine. Livestock Science 105 105108
Lara, BA, Mendoza, GD, Bárcena, R & Landois, L 2003 In situ and in vitro ruminal degradability of protected methionine. Técnica Pecuaria México 41 91103
Lobley, GE, Connell, A & Revell, D 1996 The importance of transmethylation reactions to methionine metabolism in sheep: effects of supplementation with creatine and choline. British Journal of Nutrition 75 4756
Madsen, TG, Nielsen, L & Nielsen, MO 2005 Mammary nutrient uptake in response to dietary supplementation of rumen protected lysine and methionine in late and early lactating dairy goats. Small Ruminant Research 56 151164
NRC 2007 Nutrient Requirements of Small Ruminants: Sheep, Goats, Cervids, and New World Camelids. Washington, DC: The National Academic Press
Pissios, P, Hong, S, Kennedy, AR, Prasad, D, Liu, FF & Maratos-Flier, E 2013 Methionine and choline regulate the metabolic phenotype of a ketogenic diet. Molecular Metabolism 2 306313
Poljičak-Milas, N & Marenjak, TS 2007 Dietary supplement of the rumen protected methionine and milk yield in dairy goats. Archiv Tierzucht 50 273278
Salama, AAK, Caja, G, Albanell, E, Such, Z, Casals, R & Plaixats J, 2003 Effects of dietary supplements of zinc-methionine on milk production, udder health and zinc metabolism in dairy goats. Journal of Dairy Research 70 917
Sall, J, Lehman, A, Stephens, M & Creighton, L 2012 JMP® Start Statistics: A Guide to Statistics and Data Analysis. Cary, NC, USA: SAS Institute Inc
Steel, GDR, Torrie, JH & Dickey, DA 1997 Principles and Procedures of Statistics. A Biometrical Approach. New York: McGraw-Hill
Thumelin, S, Esser, V, Charvy, D, Kolodziej, M, Zammit, VA, McGarry, D, Girard, J & Pegorier, JP 1994 Expression of liver carnitine palmitoyltransferase I and II genes during development in the rat. Biochemical Journal 300 583587
Van Soest, PJ, Robertson, JB & Lewis, BA 1991 Methods for dietary fibre, neutral detergent fibre, and nonstarch carbohydrates in relation to animal nutrition. Journal of Dairy Science 74 35833597
Zhan, XA, Li, JX, Xu, ZR & Zhao, RQ 2006 Effects of methionine and betaine supplementation on growth performance, carcase composition and metabolism of lipids in male broilers. British Poultry Science 47 576580
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Journal of Dairy Research
  • ISSN: 0022-0299
  • EISSN: 1469-7629
  • URL: /core/journals/journal-of-dairy-research
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