| Titles |
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English :
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Growing and mature rabbit performance as affected by zinc methionin in diet
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Arabic :
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تأثير اضافة مثيونين الزنك في العليقة على معدلات اداء الارانب النامية و الناضجة
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| Abstract |
A total number of four hundred and eight New-Zealand White (NZW) rabbits was used in the present study to evaluate the effect of Zinc-Methionine supplementation at different levels to the diets on some productive and reproductive capabilities of growing and mature periods. The present work included two experiments. The first experiment was lasted 40 days and carried out during growing period on 248 weaned NZW rabbits aged 30 days.
The second experiment was lasted 4 months and carried out on 132 multiparous does and 28 sexual mature bucks of NZW rabbits aged 9 months. All rabbits in two experiments were divided into four equal comparable experimental groups (62 growing rabbits, 7
bucks and 33 does in two sequence parities in each group). The first group was kept untreated (as a control group) and fed the commercial diet, while the other three groups (treated groups) were fed the same diet and supplemented with 250; 500 or 750 gm/ ton
Zinc-Methionine, respectively during the experimental period.
The results obtained showed that, daily body weight gain; feed efficiency and feed conversion values of growing NZW rabbits fed diet supplemented with 0.025; 0.050 or 0.075% Zinc-Methionine significantly (P<0.05) improved, while daily feed intake was insignificantly higher due to Zinc-Methionine. Feeding diet supplemented with 250; 500 or 750 g Zinc-Methionine/ton significantly (P<0.05)increased dressing %;carcass and internal organs weight (absolute and relative) represented by weights and percentages of each of spleen; kidneys; liver; heart and lungs, as well as, blood picture of growing NZW rabbits represented by (red and white blood cells count; hemoglobin concentration and hematocrite percentage) and some blood constitute such plasma total protein and its fractions (albumin; globulin and albumin/ globulin ratio). Some enzymes indicated liver function and activity of growing NZW rabbits represented by values of each of glutamic-oxaloacetic transaminase (GOT) and glutamic-pyruvic transaminase (GPT) were significantly (P<0.05) increased by supplementing of Zinc -Methionine to the diet. Supplementing 250; 500 or 750 g/ ton Zinc-Methionine to the diet of NZW rabbit bucks improved significantly (P<0.05) their reproductive capability represented by libido and physical semen characteristics (semen-ejaculate volume; advanced-sperm motility; live and normal spermatozoa; acrosome status and sperm-cell concentration per ml and per ejaculate); gonads and pituitary gland weight; scrotal circumference and testicular index. Testosterone concentration and mating activity of NZW rabbit bucks fed diet
The NZW rabbit does fed diet contained 250; 500 or 750 g/ ton Zinc-Methionine and mated naturally by using bucks fed the same treated diet recorded kindling rate; litter size and weight at birth; milk yield and pre-weaning mortality rate were significantly (P<0.05)better than those received an untreated diet.
It is interested to note that, eating diets contained 500 or 750 g Zinc-Methionine/ton showed significantly (P<0.05) superior than that included 250 g, while there were no significant differences recorded between 500 and 750 g/ ton supplementation in all parameters studied.
Generally, it can be concluded that supplementation 250; 500 or 750 gm/ ton Zinc-Methionine to NZW rabbit diet showed a great role in enhancing the immune system, improved growth performance, blood metabolites and reproductive performance.
From the economic point 500 gm/ ton Zinc-Methionine is recommended for both growing and mature periods.
Key words: rabbits; Zinc-Methionine; blood; carcass; performance, semen, fertility.
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| Publication year |
2009
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| Pages |
931-948
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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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| City |
طابا
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| serial title |
5th International Poultry Conference
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| Author(s) from ARC |
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| External authors (outside ARC) |
خورشد مصطفى الجندى
معهد الكفاية الانتاجية - جامعة الزقازيق
حسن ابراهيم على
معهد الكفاية الانتاجية - جامعة الزقازيق
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Blood.
Carcasses.
Fertility.
Methionine.
Performance testing.
Rabbits.
Semen.
Zinc.
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| Publication Type |
Conference/Workshop
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