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饲料粉碎粒度和调质温度对肉鸡养分消化率及生长性能的影响

DOI: 10.3969/j.issn.1006-267x.2014.10.025

Keywords: 粉碎粒度,调质温度,肉鸡,生长性能,养分消化率

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Abstract:

饲料制粒可以提高采食量和缩短采食时间,以提高肉鸡生长性能和饲料转化率。而原料的粉碎和调质是制粒过程中非常重要的环节,不仅直接影响到饲料的营养价值和肉鸡的消化吸收,还会影响加工成本和产品质量。粉碎粒度过大会导致混合不均匀、颗粒品质欠佳等不利影响,并且对动物的采食及采食后的物理性消化产生影响,粒度过小则会对动物健康产生不利影响。调质过程主要是使饲料受到水热作用,使其蛋白质变性、淀粉糊化等,调质温度是调质环节的关键参数,温度的高低对蛋白质变性及淀粉糊化程度有直接影响,从而间接影响到动物的生长性能和养分消化利用率。同时,调质温度过高会导致饲料中添加的酶制剂及维生素等严重失活,反而会降低饲料的营养价值。本文综述了肉鸡饲料粉碎粒度和调质温度的研究进展,阐述了粉碎粒度、调质温度与肉鸡生长性能和养分消化率的重要关系。

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