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| Titel: |
Effect of Environmental Temperature on Digestive Tract, Visceral Organ Size, Digestibility and Energy Metabolism in Rats Fed Different Levels of Pea Fibre |
| Auteur: |
Zhao, Xin-Quan Jørgensen, Henry Gabert, Vince M. Eggum, Bjøm O. |
| Verschenen in: |
Acta agriculturae Scandinavica. Section A, Animal science |
| Paginering: | Jaargang 46 (1996) nr. 3 pagina's 183-192 |
| Jaar: |
1996-08-01 |
| Inhoud: |
A study was performed to investigate the effect of environmental temperature (18°C or 28°C) and increasing levels of pea fibre in the diet on digestive tract, visceral organ size, digestibility and energy metabolism in rats. Thirty-six male Wistar rats, initial liveweight (LW) 77-79 g, were allocated to six groups and housed at either 18°C (three groups) or 28°C (three groups). Three wheat starch, fish meal and pea fibre-based diets were prepared to contain 100, 200 and 300 g pea fibre kg-1 (68, 110 and 157 g dietary fibre kg-1 DM) and 160 g protein (N × 6.25) kg-1. One group of rats at each temperature was fed one of the diets for four balance periods. Gas-exchange measurements were made and urine and faeces were quantitatively collected. Food to gain ratio was higher (P <.05) at 18°C than at 28°C and increased (P <.05) as the level of fibre was increased. The weight of the visceral organs from rats housed at 18°C was higher (P<.05) than at 28°C. The empty weight of the small intestine, caecum and colon increased (P <.05) as the level of pea fibre was increased. The digestibility of DM, protein and dietary fibre (DF) was lower (P <.05) at 18°C than at 28°C. As the level of pea fibre was increased, the digestibilities of nutrients and energy decreased (P <.05). However, the digestibility of DF increased (P <.05) as the level of pea fibre was increased. The partial digested energy value for pea fibre was 11.9 kJ g-1. The metabolizable energy (ME) intake and heat production at 18°C (1128 and 974 kJ (W0.75 day)-1 respectively) were higher (P<.05) than at 28°C (831 and 674 kJ (W0.75 day)-1 respectively). As the level of pea fibre was increased, ME intake (W0.75 day)-1 and heat production (W0.75 day)-1 decreased (P <.05). Heat production as a percentage of ME was higher (P <.05) at 18°C than at 28°C: 86.6% and 81.2%, respectively. Heat production as a percentage of ME was higher (P <.05) for rats fed the 100 g pea fibre kg-1 diet than the 200 or 300 g pea fibre kg-1 diet. In conclusion, environmental temperature as well as DF influenced digestive tract and visceral organ size, digestion and protein and energy metabolism. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 8 gevonden artikelen
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