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Influence of Dietary Calcium and Phosphorus Imbalance on Intestinal NaPi-IIb and Calbindin mRNA Expression and Tibia Parameters of Broilers

文献类型： 外文期刊

作者： Li, Jianhui 1 ; Yuan, Jianmin 1 ; Guo, Yuming 1 ; Sun, Qiujuan 1 ; Hu, Xiaofei 3 ;

作者机构： 1.China Agr Univ, State Key Lab Anim Nutr, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

2.Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Shanxi, Peoples R China

3.Henan Acad Agr Sci, Henan Key Lab Anim Immunol, Zhengzhou 450002, Peoples R China

关键词： Broilers;Calbindin;Calcium;NaPi-IIb;Phosphorus;Tibia

期刊名称：ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES （ 影响因子：2.509； 五年影响因子：2.604 ）

ISSN： 1011-2367

年卷期： 2012 年 25 卷 4 期

页码：

收录情况： SCI

摘要： A 2x2 factorial experiment was conducted to study the effect of dietary calcium and non-phytate phosphorus (nPP) imbalance on calbindin and NaPi-lib mRNA levels in the small intestine and tibia parameters of broiler chicks. One hundred and forty four 1-d-old Arbor Acres male broiler chicks were divided into four treatments consisted of six replicates with six chicks each. The two dietary calcium levels were 1.10% and 0.60%, and two dietary nPP levels were 0.50% and 0.27%. Results showed that a high Ca/nPP ratio diet (4.07:1) significantly depressed feed intake and weight gain of broilers (p<0.05), but a lower Ca:nPP ratio (1.2:1) had no influence (p>0.05). Low-Ca with low-P diet resulted in low tibia minerals and tibia breaking strength of broilers, and all the tibia parameters were further decreased when the dietary ratio of Ca to P was relative higher. Low dietary Ca or P up-regulated the calbindin and NaPi-lib mRNA expression levels. Low Ca with normal P diet up-regulated duodenal calbindin mRNA expression level to the greatest extent. Low P with a normal Ca diet significantly enhanced NaPi-IIb mRNA expression level to the highest extent. These results suggest that the calbindin and NaPi-IIb mRNA expression were enhanced by the imbalance between dietary Ca and nPP, and their expression were not only influenced by Ca or nPP level, but also the ratio of Ca:nPP.

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