Author(s) |
Kim, Eunjoo
Morgan, Natalie K
Moss, Amy F
Li, Lily
Ader, Peter
Choct, Mingan
|
Publication Date |
2022-03
|
Abstract |
This study was to characterise the undigested nutrients present along the gastrointestinal tract of birds offered common wheat- or maize-based diets, with the goal of optimising utilisation of enzymes to enhance digestive efficiency. Wheat- and maize-based diets were offered to 240 mixed-sex broilers (10 birds/pen; <i>n</i> = 12) from 1 to 35 d poste-hatch. Digestibility of dry matter, starch, crude protein and nonstarch polysaccharides (NSP) were measured in the crop, gizzard, duodenum, jejunum, ileum, caeca and excreta at d 12 and 35 poste-hatch. Analysis of nutrient levels in the excreta presented that more than 30% of nutrients provided in the feed was wasted, irrespective of wheat or maize diet type. On average, 92 g/kg crude protein, 92 g/kg insoluble NSP and 14 g/kg oligosaccharides were not utilised by birds at d 12 poste-hatch. The quantity of water-insoluble NSP in the small intestine at d 12 was lower in birds offered the wheat-based diet compared to those fed the maize-based diet (<i>P</i> < 0.05), with the reverse being true for water-soluble NSP (<i>P</i> < 0.001). On average, 84 g/kg crude protein, 79 g/kg insoluble NSP and 9 g/kg oligosaccharides remained in the excreta at 35 d of age. At this time period, accumulation of feed in the gizzard was noted for birds offered both diets, but was more pronounced in those offered the maize-based diet (<i>P</i> < 0.001). Birds offered the maize-based diet demonstrated improved utilisation of oligosaccharides compared to those fed the wheat-based diet at both d 12 and 35 (<i>P</i> = 0.087 and <i>P</i> = 0.047, respectively). Protein utilisation in the jejunum and ileum was greater in birds offered the wheat-based diet compared to those fed the maize-based diet (<i>P</i> = 0.004 and <i>P</i> < 0.001, respectively). Thus, while both diets supported standard growth performance of birds, the degree and flow of nutrient disappearance along the gastrointestinal tract was influenced by cereal type and bird age.
|
Citation |
Animal Nutrition, 8(1), p. 153-159
|
ISSN |
2405-6383
2405-6545
|
Pubmed ID |
34977385
|
Link | |
Publisher |
Zhongguo Xumu Shouyi Xuehui, Chinese Association of Animal Science and Veterinary Medicine
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
Title |
Characterisation of undigested components throughout the gastrointestinal tract of broiler chickens fed either a wheat- or maize-based diet
|
Type of document |
Journal Article
|
Entity Type |
Publication
|
Name | Size | format | Description | Link |
---|---|---|---|---|
openpublished/CharacterisationKimMorganMossLiChoct2022JournalArticle.pdf | 340.193 KB | application/pdf | Published version | View document |