一项对石灰岩颗粒大小对性能影响,和的内皮消化能力以及 brojlers和pullets的骨特征的比较研究
A R Jafari Arvari1, S Mirzaie Goudarzi1, M R Abdollahi2
1Department of Animal Science, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.
British poultry science
|October 20, 2023
概括
较大的石灰岩颗粒大小改善了 brojler 的生长和营养吸收,而粗颗粒促进了的吸收和的在子. 这突出显示了粒子大小.
科学领域:
- 禽类的营养养方法
- 动物科学动物科学
- 消化系统生理学 消化系统生理学
背景情况:
- 不同的 brojler 和 pullet 生长速度可能会影响对食参数的反应,例如石灰岩颗粒大小.
- 了解石灰岩颗粒大小的影响对于优化家禽的营养利用和骨发育至关重要.
研究的目的:
- 评估石灰岩颗粒大小对肉和母生长,胃肠道特征和营养消化能力的影响.
- 评估对十二指肠calbindin基因表达和骨特征的影响.
主要方法:
- 一个2x2的因数排列,使用240只 (120只肉,120只母) 的2个石灰石颗粒大小 (<0.5毫米对比1-2毫米).
- 测量包括生长性能,胃肠道特征,阴茎形态,calbindin基因表达, (Ca) 和 (P) 的明显阴茎消化率 (AIDC) 和部特征.
- 实验从1到21天的年龄进行,每次治疗有6个复制品.
主要成果:
- 与幼相比,肉的料摄入量,体重增加和料转换率 (FCR) 都优于母.
- brojlers 显示了增强的的宽度,高度和密室深度. 粗石灰岩颗粒增加了和的明显的内皮消化能力.
- 食粗石灰岩的小鸟具有更高的calbindin基因表达和骨酸度,表明鸟类类型和颗粒大小之间的相互作用.
结论:
- 肉比小母更好地表现出叶吸收能力和生长性能.
- 石灰岩颗粒大小的增加会对的高度,的消化能力和的度产生积极的影响.
- 石灰岩颗粒大小是影响家禽营养利用和骨发育的关键因素,在 brojlers和pullets之间有不同的影响.
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