title: The digestion of kiwifruit (Actinidia deliciosa) fibre and the effect of kiwifruit on the digestibility of other dietary nutrients.
abstract: The effect of dietary kiwifruit inclusion level on the digestibility of kiwifruit fibre and dietary nutrients was studied. Ileal cannulated pigs (50±1.9 kg) were fed a fibre-free diet for seven days (n=14) followed by kiwifruit-containing diets (133 or 266 g kiwifruit/kg dry matter) (n=7) for 44 days followed by the fibre-free diet (n=14) for seven days. Faecal and ileal samples were collected on days 5, 11, 21, 35, 49 and 56. The soluble kiwifruit fibre was highly digested in the foregut (80%), and the insoluble fibre in the hindgut (95%). Increasing the kiwifruit inclusion level decreased the apparent ileal and faecal digestibilities of several nutrients (P<0.05), including the faecal digestibility of insoluble kiwifruit fibre and led to higher ileal and faecal concentrations of short-chain fatty acids (P<0.05). The decreased digestibility was explained by the lower digestibility of kiwifruit itself. The duration of kiwifruit consumption per se did not affect dietary nutrient digestibility (P>0.05).
authors.affiliation: Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand. Electronic address: c.montoya@massey.ac.nz.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Montoya
authors.affiliation: Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Stuart
authors.initials: S
authors.lastname: Saigeman
authors.affiliation: Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Shane M
authors.initials: SM
authors.lastname: Rutherfurd
authors.affiliation: Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Moughan
mesh_terms: D029042:Actinidia / Q000737:chemistry / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D004043:Dietary Fiber / Q000032:analysis / Q000378:metabolism*; D004063:Digestion; D005638:Fruit / Q000737:chemistry / Q000378:metabolism; D007082:Ileum / Q000378:metabolism; D013552:Swine
keywords: Green kiwifruit fibre; Growing pig; Ileal and faecal digestibility; Short-chain fatty acids