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Dietary carbohydrate composition modifies the milk N efficiency in late lactation cows fed low crude protein diets

  • G. Cantalapiedra-Hijar (a1), J. L. Peyraud (a2) (a3), S. Lemosquet (a2) (a3), E. Molina-Alcaide (a4), H. Boudra (a1), P. Nozière (a1) and I. Ortigues-Marty (a1)...


Nitrogen emissions from dairy cows can be readily decreased by lowering the dietary CP concentration. The main objective of this work was to test whether the milk protein yield reduction associated with low N intakes could be partially compensated for by modifying the dietary carbohydrate composition (CHO). The effects of CHO on digestion, milk N efficiency (milk N/N intake; MNE) and animal performance were studied in four Jersey cows fed 100% or 80% of the recommended protein requirements using a 4×4 Latin square design. Four iso-energetic diets were formulated to two different CHO sources (starch diets with starch content of 34.3% and NDF at 32.5%, and fiber diets with starch content of 5.5% and NDF at 49.1%) and two CP levels (Low=12.0% and Normal=16.5%). The apparent digestible organic matter intake (DOMI) and the protein supply (protein digestible in the small intestine; PDIE) were similar between starch and fiber diets. As planned, microbial N flow (MNF) to the duodenum, estimated from the urinary purine derivatives (PD) excretion, was similar between Low and Normal CP diets. However, the MNF and the efficiency of microbial synthesis (g of microbial N/kg apparently DOMI) were higher for starch v. fiber diets. Milk and milk N fractions (CP, true protein, non-protein N (NPN)) yield were higher for starch compared with fiber diets and for Normal v. Low CP diets. Fecal N excretion was similar across dietary treatments. Despite a higher milk N ouput with starch v. fiber diets, the CHO modified neither the urinary N excretion nor the milk urea-N (MUN) concentration. The milk protein yield relative to both N and PDIE intakes was improved with starch compared with fiber diets. Concentrations of β-hydroxybutyrate, urea and Glu increased and those of glucose and Ala decreased in plasma of cows fed starch v. fiber diets. On the other hand, plasma concentration of albumin, urea, insulin and His increased in cows fed Normal compared with Low CP diets. This study showed that decreasing the dietary CP proportion from 16.5% to 12.0% increases and decreases considerably the MNE and the urinary N excretion, respectively. Moreover, present results show that at similar digestible OM and PDIE intakes, diets rich in starch improves the MNE and could partially compensate for the negative effects of Low CP diets on milk protein yield.


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Agricultural Research Council (ARC) 1984. The nutrient requirements of ruminant livestock. Supplement no. 1. Commonwealth Agricultural Bureaux, Slough, UK.
Association of Official Analytical Chemists (AOAC) 2005. Official methods of analysis, 18th edition. AOAC, Arlington, VA, USA.
Aufrère, J, Graviou, D, Demarquilly, C, Vérité, R, Michalet-Doreau, B and Chapoutot, P 1991. Predicting in situ degradability of feed proteins in the rumen by two laboratory methods (solubility and enzymatic degradation). Animal Feed Science and Technology 33, 97116.
Brandt, M, Rohr, K and Lebzien, P 1981. Quantification of N-metabolism in the forestomach of dairy cows, pt. 2: The effect of nitrogen supply and feeding frequency on rumen N metabolism. Journal of Animal Physiology and Animal Nutrition 46, 4959. in German.
Broderick, GA 2003. Effects of varying dietary protein and energy levels on the production of lactating dairy cows. Journal of Dairy Science 86, 13701381.
Calsamiglia, S and Stern, MD 1995. A three-step in vitro procedure for estimating intestinal digestion of protein in ruminants. Journal of Animal Science 73, 14591465.
Calsamiglia, S, Ferret, A, Reynolds, CK, Kristensen, NB and Van Vuuren, AM 2010. Strategies for optimizing nitrogen use by ruminants. Animal 4, 11841196.
Cantalapiedra-Hijar, G, Rodriguez-Lopez, JM, Illovies, A, Messad, F and Ortigues-Marty, I 2013. The effect of dietary energy source on net flux of nutrients across the portal-drained viscera and liver in dairy cows fed at two protein levels. Proceedings of 4th Interantional Symposium of Energy and Protein Metabolism and Nutrition, 9–12 Septembre 2013, Sacramento, CA, USA, In press.
Cantalapiedra-Hijar, G, Fanchone, A, Noziere, P, Peyraud, JL, Lemosquet, S, Doreau, M and Ortigues-Marty, I 2012. Efficiency of N utilization following a decreased nitrogen supply in dairy rations: effect of the energy source. Abstract (French). Rencontres autour des Recherches sur les Ruminants 19, 59.
Castillo, AR, Kebreab, E, Beever, DE and France, J 2000. A review of efficiency of nitrogen utilisation in dairy cows and its relationship with environmental pollution. Journal of Animal and Feed Sciences 9, 132.
Chen, XB and Gomes, MJ 1995. Estimation of microbial protein supply to sheep and cattle based on urinary excretion of purine derivatives – an overview of the technical details. Occasional Publ. 1992. Int Feed Resources Unit, Rowett Res. Inst, Aberdeen, UK.
Doreau, M, Delacroix, A, Jouany, JP, Durier, C and Rémond, B 1990. The influence of physiological state and dietary nitrogen supply on digestion in the dairy cow. Journal of Animal Science 68, 38533860.
Eadie, JM, Hyldgaard-Jensen, J, Mann, SO, Reid, RS and Whitelaw, FG 1970. Observations on the microbiology and biochemistry of the rumen in cattle given different quantities of a pelleted barley ration. British Journal of Nutrition 24, 157177.
European Union 2000. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 on establishing a framework for community action in the field of water policy. Official Journal of the European Union 327, 172.
Faisant, N, Planchot, V, Kozlowski, F, Pacouret, MP, Colonna, P and Champ, M 1995. Resistant starch determination adapted to products containing high level of resistant starch. Science des Aliments 15, 8389.
Fanchone, A, Nozière, P, Portelli, J, Duriot, B, Largeau, V and Doreau, M 2013. Effects of nitrogen underfeeding and energy source on nitrogen ruminal metabolism, digestion, and nitrogen partitioning in dairy cows. Journal of Animal Science 91, 895906.
Firkins, JL and Reynolds, CK 2005. Whole animal nitrogen balance in cattle. In Nitrogen and phosphorus nutrition of cattle and environment (ed. AN, Hristov and E, Pfeffer), pp. 167185. CABI publishing, Wallingford, UK.
Hristov, AN and Ropp, JK 2003. Effect of dietary carbohydrate composition and availability on utilization of ruminal ammonia nitrogen for milk protein synthesis in dairy cows. Journal of Dairy Science 86, 24162427.
Huhtanen, P and Hristov, AN 2009. A meta-analysis of the effects of dietary protein concentration and degradability on milk protein yield and milk N efficiency in dairy cows. Journal of Dairy Science 92, 32223232.
INRA (ed.) 2007. Alimentation des bovins, ovins et caprins – Besoins des animaux – Valeurs des aliments – Tables INRA 2007. Editions Quae, Versailles, France.
Keady, TWJ, Mayne, CS and Marsden, M 1998. The effects of concentrate energy source on silage intake and animal performance with lactation dairy cows offered a range of grass silages. Animal Science 66, 2133.
Kebreab, E, Castillo, AR, Beever, DE, Humphries, DJ and France, J 2000. Effects of management practices prior to and during ensiling and concentrate type on nitrogen utilization in dairy cows. Journal of Dairy Science 83, 12741285.
Khalili, H and Sairanen, A 2000. Effect of concentrate type on rumen fermentation and milk production of cows at pasture. Animal Feed Science and Technology 84, 199212.
Kohn, RA, Kalscheur, KF and Russek-Cohen, E 2002. Evaluation of models to estimate urinary nitrogen and expected milk urea nitrogen. Journal of Dairy Science 85, 227233.
Kohn, RA, Dou, Z, Fergurson, JD and Boston, RC 1997. A sensitive analysis of nitrogen losses from dairy farms. Journal of Environmental Management 50, 417428.
Kristensen, NB, Pierzynowski, SG and Danfaer, A 2000. Portal drained visceral metabolism of 3-hydroxybutyrate in sheep. Journal of Animal Science 78, 22232228.
Leiva, E, Hall, MB and Van Horn, HH 2000. Performance of dairy cattle fed citrus pulp or corn products as sources of neutral detergent-soluble carbohydrates. Journal of Dairy Science 83, 28662875.
Lemosquet, S, Delamaire, E, Lapierre, H, Blum, JW and Peyraud, JL 2009. Effects of glucose, propionic acid and nonessential amino acids on glucose metabolism and milk yield in Holstein dairy cows. Journal of Dairy Science 92, 32443257.
Majdoub, L, Vermorel, M and Ortigues-Marty, I 2003. Ryegrass-based diet and barley supplementation: partition of energy-yielding nutrients among splanchnic tissues and hind limbs in finishing lambs. Journal of Animal Science 81, 10681079.
Nozière, P, Ortigues-Marty, I, Loncke, C and Sauvant, D 2010. Carbohydrate quantitative digestion and absorption in ruminants: from feed starch and fibre to nutrients available for tissues. Animal 4, 10571074.
Peyraud, JL, Le Liboux, S and Verite, R 1997. Effect of the level and nature of the source of rumen degradable nitrogen on ruminal digestion in dairy cow fed with a maize silage based diet. Reproduction Nutrition and Development 37, 313328.
Reist, M, Erdin, D, Von Euw, D, Tschuemperlin, K, Leuenberger, H, Delavaud, C, Chilliard, Y, Hammon, HM, Kuenzi, N and Blum, JW 2003. Concentrate feeding strategy in lactating dairy cows: metabolic and endocrine changes with emphasis on leptin. Journal of Dairy Science 86, 16901706.
SAS 2008. User’s guide: statistics, version 9.2 edition. SAS Institute Inc., Cary, NC.
Savary-Auzeloux, I, Kraft, G, Bequette, BJ, Papet, I, Rémond, D and Ortigues-Marty, I 2010. Dietary nitrogen to energy ratio alters amino acid partition in the whole body and among the splanchnic tissues of growing rams. Journal of Animal Science 88, 21222131.
Sloan, BK, Rowlinson, P and Armstrong, DG 1988. Milk production in early lactation dairy cows given grass silage ad libitum: influence of concentrate energy source, crude protein content and level of concentrate allowance. Animal Production 46, 317331.
Spanghero, M and Kowalski, ZM 1997. Critical analysis of N balance experiments with lactating cows. Livestock Production Science 52, 113122.
Sutton, JD, Morant, SV, Bines, JA, Napper, DJ and Givens, DI 1993. Effect of altering the starch : fibre ratio in the concentrates on hay intake and milk production by Friesian cows. Journal of Agricultural Science 120, 379390.
Van Duinkerken, G, Blok, MC, Bannink, A, Cone, JW, Dijkstra, J, Van Vuuren, AM and Tamminga, S 2011. Update of the Dutch protein evaluation system for ruminants: the DVE/OEB2010 system. Journal of Agricultural Science 149, 351357.
Van Knegsel, ATM, van den Brand, H, Dijkstra, J, Tamminga, S and Kemp, B 2005. Effect of dietary energy source on energy balance, production, metabolic disorders and reproduction in lactating dairy cattle. Reproduction Nutrition and Development 45, 665688.
Van Knegsel, ATM, van den Brand, H, Graat, EA, Dijkstra, J, Jorritsma, R, Decuypere, E, Tamminga, S and Kemp, B 2007. Dietary energy source in dairy cows in early lactation: metabolites and metabolic hormones. Journal of Dairy Science 90, 14771485.
Van Soest, PJ, Robertson, JB and Lewis, BA 1991. Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition. Journal of Dairy Science 74, 35833597.


Dietary carbohydrate composition modifies the milk N efficiency in late lactation cows fed low crude protein diets

  • G. Cantalapiedra-Hijar (a1), J. L. Peyraud (a2) (a3), S. Lemosquet (a2) (a3), E. Molina-Alcaide (a4), H. Boudra (a1), P. Nozière (a1) and I. Ortigues-Marty (a1)...


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