Carbohydrase and phytase supplementation in diets for semi-heavy laying hens
Carbohydrase and phytase supplementation in diets for semi-heavy laying hens
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DOI：
10.4025/actascianimsci.v36i3.21952
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发表时间：
2014-09-01
期刊：
影响因子：
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通讯作者：
Nogueira, Filipe Soares
中科院分区：
文献类型：
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作者：
Geraldo, Adriano;Gomes, Karina Rodrigues Aurora;Nogueira, Filipe Soares
本研究旨在探讨植酸酶与一种复合糖酶（α-半乳糖苷酶、半乳甘露聚糖酶、木聚糖酶和β-葡聚糖酶）在半重型蛋鸡营养减量型日粮中的相互作用及其对产蛋性能和蛋品质的影响。选用400只42 ~ 57周龄的伊萨褐蛋鸡，进行5个处理8个重复的完全随机试验，分5个生产周期，每个生产周期21天。研究的变量：产蛋量、采食量、平均蛋重、饲料转化率、哈氏单位、蛋黄率、蛋白色率、蛋白率、蛋黄颜色、蛋壳厚度和比重。采食量在处理和试验周期之间存在显著的交互作用（p < 0.05）。处理对蛋鸡的生产性能、蛋重、蛋内外品质均无显著影响（p > 0.05）。对饲料转化率的处理效果显示，饲喂对照饲料的母鸡具有更好的值。在添加或不添加酶的日粮中使用的营养减少水平在饲料转化率和采食量方面没有提供良好的结果。但是，它们不影响产蛋量和蛋的内部和外部质量的其他参数。
t This study was conducted in order to evaluate the association of phytase with an enzymatic complex comprised of carbohydrases (alpha-galactosidase, galactomannan, xylanase and beta-glucanase) in nutrition reduction diets for semi-heavy laying hens and its effect on egg performance and egg quality. Four hundred Isa Brown laying hens with 42 to 57 weeks of age were distributed in an entirely random experiment with five treatments and 8 repetitions, during five production periods of 21 days. Variables studied: egg production, feed intake, mean egg weight, feed conversion, Haugh unit, percentage of yolk, egg white and albumen, yolk color, eggshell thickness and specific gravity. There was a significant interaction (p < 0.05) between treatments and experimental periods for feed intake. There were no significant effects (p > 0.05) of treatment on production, egg weight or internal and external egg quality. Treatment effects on feed conversion showed better values for hens fed with the control diet. The levels of nutrient reduction used in the diets with or without enzyme supplementation did not provide good results with regard to feed conversion and feed intake. However, they did not affect the other parameters for egg production and internal and external egg quality.