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This Article Free Via Open Access Full Text Full Text (PDF) All Versions of this Article: jas.2006-060v1 86/9/2208    most recent Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Serena, A. Articles by Bach Knudsen, K. E. Search for Related Content PubMed PubMed Citation Articles by Serena, A. Articles by Bach Knudsen, K. E.

Digestion of carbohydrates and utilization of energy in sows fed diets with contrasting levels and physicochemical properties of dietary fiber¹

Department of Animal Health, Welfare and Nutrition, University of Aarhus,Faculty of Agricultural Sciences, PO Box 50, DK-8830 Tjele, Denmark

³ Corresponding author: knuderik.bachknudsen{at}agrsci.dk

Three experimental diets were used to investigate the digestion of carbohydrates and utilization of energy in sows fed diets with different levels and physicochemical properties of dietary fiber (DF). The low-fiber diet (LF; DF, 16%; soluble DF, 4.8%) was based on wheat and barley. The high-fiber 1 diet (HF1; DF, 41%; soluble DF, 11%) was based on wheat and barley supplemented with the coproducts: sugar beet pulp, potato pulp, and pectin residue, and the high-fiber 2 diet (HF2; DF, 44%; soluble DF, 7.3%) was based on wheat and barley supplemented with approximately 1/3 of the coproducts used in diet HF1 and 2/3 of brewers spent grain, seed residue, and pea hull (1:1:1, respectively). The diets were studied in 2 series of experiments. In Exp. 1, the digestibility and ileal and fecal flow of nutrients were studied in 6 ileal-cannulated sows placed in metabolic cages designed as a repeated 3 x 3 Latin square design. In Exp. 2, energy metabolism was measured in respiration chambers using 6 sows in a repeated 3 x 3 Latin square design. The DF level influenced the ileal flow of most nutrients, in particular carbohydrates, which increased from 190 g/d when feeding the LF diet to 538 to 539 g/d when feeding the HF diets; this was also reflected in the digestibility of OM and carbohydrates (P < 0.05). The ranking of total excretion of fecal materials was HF2 > > HF1 > LF, which also was reflected in the digestibility of OM, protein, and carbohydrates. Feeding HF diets resulted in greater CH₄ production, which was related to the amount of carbohydrates (r = 0.79) and OM (r = 0.72) fermented in the large intestine, but with no difference in heat production (12.2 to 13.1 MJ/kg of DM). Retained energy (MJ/kg of DM) was decreased when feeding HF1 compared with LF and negative when feeding HF2. Feeding sows HF1 reduced the activity of animals (5.1 h/24 h) compared with LF (6.1 h/24 h; P = 0.045).

Key Words: coproduct • carbohydrate • digestibility • energy metabolism • sow

This article has been cited by other articles:

				A. Serena, H. Jorgensen, and K. E. Bach Knudsen Absorption of carbohydrate-derived nutrients in sows as influenced by types and contents of dietary fiber J Anim Sci, January 1, 2009; 87(1): 136 - 147. [Abstract] [Full Text] [PDF]

				A. Serena, M. S. Hedemann, and K. E. Bach Knudsen Influence of dietary fiber on luminal environment and morphology in the small and large intestine of sows J Anim Sci, September 1, 2008; 86(9): 2217 - 2227. [Abstract] [Full Text] [PDF]