Effects of dynamic segmentation of nutrient supply on growth performance and intestinal development of broilers
| Autor: | Shu Zhang, Wenhuan Chang, Huiyi Cai, Guohua Liu, Yan Haijie, Xiangyang Huang |
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| Rok vydání: | 2016 |
| Předmět: |
Broilers
Performance 0402 animal and dairy science 04 agricultural and veterinary sciences 02 engineering and technology Anatomy Biology Intestinal morphology Phase feeding 040201 dairy & animal science Poultry Nutrition Intestine Animal science Nutrient 020401 chemical engineering Food Animals Immune organ index Animal Science and Zoology lcsh:Animal culture 0204 chemical engineering lcsh:SF1-1100 |
| Zdroj: | Animal Nutrition Animal Nutrition, Vol 2, Iss 4, Pp 276-281 (2016) |
| ISSN: | 2405-6545 |
| DOI: | 10.1016/j.aninu.2016.08.005 |
| Popis: | This experiment was to investigate the effects of dynamic segmentation of interval nutrient supply phase feeding on the growth performance, carcass characteristics, immune organs indexes and intestinal morphology of broilers. A total of 320 one-day-old broilers were randomly assigned into 4 feeding treatments, which included 4 interval nutrient supply phases as follows. Treatment A: a nutrient supply standard was used for every 14 d. Treatment B: a nutrient supply standard was used for every 7 d. Treatment C: a nutrient supply standard was used for every 3.5 d except that one nutrient supply standard was used for d 1 to 7. Treatment D: a nutrient supply standard was used for every 3.5 d including d 1 to 7. Each treatment was represented by 8 replicates with 10 broilers per replicate. The trial lasted for 42 days. Throughout the 42 d trial period, treatment A showed significantly higher average daily gain than treatments B and C (P 0.05). The crypt depth of duodenum was significantly greater in treatments A and B than in treatment C on day 42 (P 0.05). In conclusion, this study revealed that the growth and carcass performance of broilers is the best for 14 days segmentation phase feeding, and 3.5 days segmentation interval phase feeding can promote small intestinal development of broilers. Dynamic segmentation of dietary supply fails to affect the immune function of broilers. |
| Databáze: | OpenAIRE |
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