Changes in the quality of eggs during storage depending on the housing system and the age of hens
Changes in the quality of eggs during storage depending on the housing system and the age of hens
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DOI：
10.3382/ps/pez401
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发表时间：
2019-11-01
期刊：
影响因子：
4.4
通讯作者：
Chodova, D.
中科院分区：
文献类型：
--
作者：
Vlckova, J.;Tumova, E.;Chodova, D.
该研究的目的是评估26周和51周龄笼养和散养鸡蛋在储存时间（0、7、14和21天）期间重量、蛋白质量及其功能特性以及蛋白质含量的变化。鸡蛋重量受到饲养系统和母鸡年龄之间显着相互作用的影响。就个体因素而言，51周时，在富集笼（61.7克）环境中获得的鸡蛋比在自由放养（59.6克）环境中获得的鸡蛋更重（P<0.001）（P<0.001）（63.3克对58.0克），并且与储存14天和21天的鸡蛋相比，新产的鸡蛋更重（P<0.001）。影响鸡蛋失重的评估因素的显着相互作用包括哈夫单位评分和 pH 值。散养鸡蛋（14.70% vs. 14.0%）、年轻母鸡的鸡蛋（15.0% vs. 13.7%）和储存 21 天的鸡蛋的蛋白干物质含量显着较高。散养鸡蛋含有更多的溶菌酶（P < 0.001），年轻母鸡产下的鸡蛋具有更高的卵转铁蛋白（P < 0.05）和卵清蛋白含量（P < 0.01）。研究数据表明，评估因素及其相互作用显着影响鸡蛋的物理参数，而蛋白功能特性以及溶菌酶、卵清蛋白和卵转铁蛋白的影响可以忽略不计。
The objective of the study was to evaluate changes during storage time (0, 7, 14, and 21 D) in the weight, albumen quality and its functional properties, and protein content of eggs from enriched cage and free range at 26 and 51 wk of age. Egg weight was affected by a significant interaction between the housing system and the age of hens. Regarding individual factors, heavier eggs (P < 0.001) were obtained with the enriched cage (61.7 g) environment than with free range (59.6 g) environment at 51 wk (P < 0.001) (63.3 g vs. 58.0 g), and freshly laid eggs were heavier compared to eggs stored for 14 and 21 D (P < 0.001). The significant interaction of evaluated factors affecting egg weight loss included the Haugh unit score and pH. Albumen dry matter content was significantly higher in free-range eggs (14.70% vs. 14.0%), in eggs from younger hens (15.0% vs. 13.7%) and in eggs that were stored 21 D. Free-range eggs contained more lysozyme (P < 0.001), and younger hens produced eggs with higher ovotransferrin (P < 0.05) and ovalbumin content (P < 0.01). The data from the study show that the evaluated factors and their interactions significantly affected the physical parameters of the eggs, whereas albumen functional properties and lysozymes, ovalbumin, and ovotransferrin were negligibly affected.