| Titles |
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English :
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Effect of dietary protein and total sulfur amino acid levels on performance, nutrient digestibility and carcass traits of growing crossbred rabbits
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| Abstract |
A total of 54 male crossbred growing rabbits ( White New Zealand x White Baladi ) of 4 weeks old were divided randomly into six treatment groups equal in number and nearly equal in live weights. Six pelleted experimental diets used contained three different levels of crude protein being 14.0, 16.0 or 18.0% with two levels of total sulfur amino acids ( TSAA) being 0.60 or 0.70%.
Results obtained could be summarized as follows:
The effect dietary protein and TSAA levels on the average body weight gain (BWG ) through the experimental period 12 weeks of age showed that the average BWG of growing rabbits fed diet containing 14% crude protein with 0.6% TSAA were significantly ( P<0.05) lower than those of the other treatments. While, the average BWG of growing rabbits fed diet containing 14% crude protein with 0.7% TSAA showed no significantly differences compared with other groups. Regarding the dietary crude protein levels, the average BWG of growing rabbits fed diet containing 14% crude protein was significant (P<0.05) lower than those fed diets containing 16% or 18% crude protein. Regarding to supplemented diet with total sulfur amino acids levels the data showed that increasing dietary from 0.6% to 0.7% TSAA significantly (P<0.05)
Increased the average BWG of growing rabbits. Rabbits fed diet containing 18% crude protein with 0.6 TSAA significantly (P < 0.05 ) consumed the lowest values of feed intake. Supplemented diets either contained 14 or 16% crude protein with 0.7 TSAA significantly ( P< 0.05 ) consumed the lowest values of feed intake. Supplemented diets either contained 14 or 16 % crude protein with 0.7 TSAA significantly ( P< 0.05) improved the feed conversion efficiency. The best value of feed conversion efficiency was recorded for growing rabbits fed diets contained 14 % with 0.7% TSAA. The level of 14% crude protein with 0.7% TSAA numerically improved digestibility coefficient of DM, CP CF, EE and NFE carcass traits relative to the live weight of rabbits at 12 weeks of age, showed that there were no significant (P<0.05) interaction differences in dressing giblet and total edible parts. Also chemical composition of rabbits meat among treatment groups due to TSAA levels within each dietary protein level were not significant. It could be recommended that using lower level of protein 14%with increasing TSAA by 0.10% than recommended level in diets of crossbred growing rabbits is sufficient and can be used as an economical advantage in saving the cost of feed.
Keywords: Growth performance, digestibility, carcass dietary protein level and dietary protein level.
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| Publication year |
2002
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| Pages |
469-481
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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 |
Animal Production Research Institute (APRI)
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| serial title |
3rd Science Conference On Rabbit production in Hot Climates
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| Author(s) from ARC |
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| External authors (outside ARC) |
محمد رضا ابراهيم
جامعة القاهرة
ممدوح عمر عبد السميع
جامعة القاهرة
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Carcass composition.
Digestibility.
Growth.
Performance testing.
Rabbits.
Sulphur amino acids.
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| Proposed Agrovoc |
dietary protein level;
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| Publication Type |
Conference/Workshop
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