| Titles |
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English :
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In vivo study of intestinal calcium and phosphorus absorpition during different stages of egg formation in the reproductive tract of high and low egg production laying hens
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Arabic :
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دراسة الامتصاص المعوى للكالسيوم و الفسفور (In vivo ) خلال المراحل المختلفة لتكوين البيضة في القناة التناسلية للدجاج المرتفع و المنخفض في انتاج البيض
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| Abstract |
Ninty laying hens of Silver Montazah at 30 weekr of age were used in this study. All birds were individually housed in banery cages, eggs number and weight were recorded daily for three months. Hens were classified into two groups, high (73.27%), and low (32.29%) according to their egg production. At 42 weekr of age, thirty experimented birds for each group were used to estimate the calcium and phosphorus absorption in the small intestine (in vivo). The birds were classified as follows: 20 birds were used at 9 a.m represents the absorption after the egg laying directly; 20 birds were used at 9 p.m. and result from this group represent the absorption during the period of calcification and the last 20 birds were used at 3 p.m, showing the absorption during the soft egg formation. The results of this study indicated that the calcium and phosphorus absorption was significantly (p<0.01) higher in the high egg production hens than the low egg production ones. Also the absorption of the calcium and phosphorus at the calcification time was significantly (P<0.01) higher than those for the soft egg stage and after laying. Moreover, the higher calcium and , phosphorus absorption was obtained in the ileum part while the lower was observed in the duodenum for the high and the low egg production groups in Silver Montazah laying hens. The relative .tibia weight and the concentration of calcium and inorganic phosphorus either in tibitror serum were significantly (p<0.01) lower for the high egg production group than the lower ones. While serum alkwline phosphatase was significantly (P<0.01) high for the high egg production group compared with the low egg production. During the different stages of the eggformation. the phosphorus concentrations in tibia and serum had increased in the calcification time than after egg laying and soft egg stages. while serum alkaline phosphatase concentration was significantly (P<0.01) decreased in the calcificafinn time than for other stages of the egg formation. Moreover. live body weight was signficantly (P<0.05) lower for the high egg production hens compared with the low egg production ones. However, largest follicle weight and the length of the oviduct parts were significantly (P<0.01) increased for the high egg production group compared with the low one. No significant differences were observed in the lengths of the oviductdwing the different stages of egg formation. Egg weight: shell weight and. relative shell weight were significantly (P<0.01) lower for the high egg production group than the low ones, while no significant differences of shell thickness were observed between both groups of egg production.
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| Publication year |
2006
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| Pages |
319-334
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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 |
الاسكندرية
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| serial title |
Egyptian Poultry Science
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| ISSN |
1110-5623
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - NutritionAnimal physiology - Reproduction
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AGROVOC
TERMS |
Calcium.
Limb bones.
Oogenesis.
Phosphorus.
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| Proposed Agrovoc |
reproductive tract;egg number;egg weight;
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| Publication Type |
Journal
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