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The effect of different levels of dietary fiber fractions on performance and immunity of growing rabbits 1- the effect of using corn cubs as a source of acid detergent fiber on growth performance, digestion, blood constitute and immunity system
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Abstract: Seventy five APRI rabbits aged 5 weeks were divided into five experimental groups (15 rabbits in each) and used to determine the effects of diet containing different levels of crude fiber fractions (acid detergent fiber, ADF and neutral detergent fiber, NDF) as follows: control, 12% (17.5 ADF and 31.27 NDF), 14% (19.84 ADF and 33.56 NDF), 16% (21.82 ADF and 37.85 NDF), 18% (23.55 ADF and 41.75 NDF) and 20% CF (25.04 ADF and 46.47 NDF) for groups 1, 2, 3, 4 and 5, respectively on growth performance, mortality rate, cecum length, pH and count of pathogenic bacteria. Average protein, digestible energy and fiber intakes were calculated. Carcass characteristics, blood constituents and nutrients digestibility were determined, while, economic efficiency was calculated at the end of the experiment.
The results revealed that, final body weight, average daily gain and feed conversion were improved with dietary 18% CF being 2383g,
31.71g/d and 3.06g feed/g gain, respectively. No mortality rate was recorded with increasing ADF The longest cecum length (48.58cm), lowest value of pH (6.02), lowest count of E.coli (550.5x102 CFU) and anaerobic bacteria (5.38x106CFU) were recorded with rabbits fed 18% CF. There were significant improvement on digestion coefficients of DM, CP, CF; as well as DCP which were improved due to increasing dietary ADF, however, no significant effects were detected for EE, NFE digestibility, TDN and DE. Also, significant increases in dressing percentage and weight of carcass, heart, liver, kidney and spleen were recorded due to increased ADF, while, abdominal fat was decreased Plasma total protein, albumin, globulin, Albumin/globulin (A/G) ratio, total lipids, glucose and cholesterol were increased due to increasing ADF The immunity responsiveness represented in leukocytes counts and mainly on lymphocytes increased significantly with increasing fiber level up to 18% CF. Net revenue and relative economical efficiency values were maximized by feeding 18% CF followed by 16% CF, then by 14% CF.
It could be concluded that dietary ADF at the level of 23.55% could be recommended to obtain the best growth performance, nutrient utilization, immunity and economical efficiency for growing APRI rabbits.
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| Publication year |
2013
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| Pages |
51-71
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
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| City |
الاسكندرية
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| serial title |
Egyptian Poultian Science
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| ISSN |
1110-5623
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Blood composition.
Carcass composition.
Energy value.
Fibres.
Mortality.
Ph.
Proteins.
Rabbits.
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| Proposed Agrovoc |
acid detergent fiber;neutral detergent fiber;growth performance;cecum length;count of pathogenic bacteria;
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| Publication Type |
Journal
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