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Impact of replacing some inorganic with organic minerals on:- 2- reproductive performance of rabbits does and bucks
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Abstract: Two experiments were designed to evaluate the influence of replacing some dietary organic minerals on reproductive performance of New Zealand White (NZW) rabbits bucks and does. In the 1st experiment a total of 40 (NZW) rabbits bucks were allotted into 8 dietary treatments to study blood picture, sexual urge, semen and spermatozoa characteristics. In the 2nd experiment a total of 40 does were allotted into 8 dietary treatments. Does were inseminated with untreated bucks. Does performance including, litter size and weight at birth and at weaning, milk yield and blood picture. Bucks in the 1st experiment and does in the 2nd experiment received the following experimental diet: T1 (control), contained all inorganic trace minerals source from diet premix, T2, contained organic (Zn) with all inorganic minerals except Zn that was organic. The other treatments follow the same manner as in T2. T3, organic (Mn), T4, organic (Se), T5, organic-(Zn+Mn), T6, organic-(Zn+Se), T7, organic (Mn+Se) and T8, organic (Zn+Mn+Se). Organic replaced inorganic minerals with 50 % of the same recommended levels for rabbit requirements (NRC, 1977). The premix was formulated to contain trace elements in combination of either inorganic' (Sulfate form) or organic form (peptide chelate form). Selenium was provided in form of yeast enriched selenium.
Results showed significant improvement in bucks and does performance with using organic minerals (Zn, Mn and Se). There were an increases in all blood parameters like WBCs. count, Ht, Hb, RBCs, T3 and testosterone due to organic treatments. There is also an improvement in all semen studied parameters due to organic replacement which were more effective than inorganic one. Does showed good results with organic minerals, where litter size and weight at birth and at weaning were increased in treatment groups compared to control group. Also the milk yields up to 3rd week were increased significantly with organic treatments compared to control one. The mortality was decreased significantly compared to the control and lowest percentage was recorded with organic zinc followed by the combination of the other organic minerals. Blood minerals retentions were significantly (P<0.05) increased with replacing some organic minerals in the premix. The increasing trend was similar in both sexes, where the combination groups recorded the highest values compared to other groups.
Key words: Rabbits, reproductive performance, organic minerals (Zn, Mn,
Se).
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| Publication year |
2012
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| Pages |
1553-1567
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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 |
3rd Mediterranean Poultry Summit and Poultry Conferences
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Litter size.
Manganese.
Rabbits.
Reproductive performance.
Selenium.
Semen.
Zinc.
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| Proposed Agrovoc |
organic minerals;inorganic minerals;does;bucks;spermatozoa characteristic;blood picture;sexual urge;
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| Publication Type |
Conference/Workshop
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