Patterson P H, Koelkebeck K W, Bell D D, Carey J B, Anderson K E, Darre M J
Department of Poultry Science, Penn State University, University Park 16802-3501, USA.
Poult Sci. 2001 Apr;80(4):390-5. doi: 10.1093/ps/80.4.390.
Large eggs promoted as having one or more features beyond conventional white or brown shell eggs (specialty eggs) were evaluated for quality and price in a national retail study. Subtypes of specialty eggs included: nutritionally altered eggs, organic eggs, fertile eggs, eggs from welfare-managed hens, or hens fed all-vegetable diets. Extension Poultry Specialists in California (CA), Connecticut, Illinois, North Carolina, Pennsylvania and Texas conducted a survey of egg quality and price and compared 246 dozen specialty eggs with 390 dozen conventional white shell eggs during the summer of 1996. Age of the eggs based on carton dating indicated specialty eggs were older (16.5 d) than white eggs (11.7 d). Average egg weights for specialty compared to white were 60.2 and 59.6 g, respectively. Interior egg quality evaluations including albumen height, Haugh units (HU), and percentage HU <55, indicated white eggs were superior (5.0 mm, 67.5, and 10.6%, respectively) compared to specialty eggs (4.7 mm, 63.8, and 16.3%). Although the percentage of cracked eggs was similar between specialty and white eggs (5.4 and 5.7%), the percentage of leakers was threefold higher for the specialty eggs (1.0 vs. 0.3%). Egg price was substantially higher for the specialty eggs, averaging $2.18/dozen with a range from 0.88 to $4.38, compared to white eggs, averaging $1.23/dozen and ranging from 0.39 to $2.35.
在一项全国性零售研究中，对那些被宣传具有一种或多种超越传统白壳或棕壳鸡蛋特征的大鸡蛋（特色鸡蛋）进行了质量和价格评估。特色鸡蛋的子类型包括：营养改良蛋、有机蛋、受精蛋、来自福利管理母鸡的蛋，或喂食全素日粮母鸡所产的蛋。加利福尼亚州（CA）、康涅狄格州、伊利诺伊州、北卡罗来纳州、宾夕法尼亚州和得克萨斯州的推广家禽专家对鸡蛋质量和价格进行了调查，并在1996年夏季将246打特色鸡蛋与390打传统白壳鸡蛋进行了比较。根据纸箱标注日期确定的鸡蛋年龄表明，特色鸡蛋（16.5天）比白壳鸡蛋（11.7天）更陈旧。特色鸡蛋与白壳鸡蛋的平均蛋重分别为60.2克和59.6克。内部鸡蛋质量评估包括蛋白高度、哈夫单位（HU）以及HU<55的百分比，结果表明，与特色鸡蛋（分别为4.7毫米、63.8和16.3%）相比，白壳鸡蛋更优质（分别为5.0毫米、67.5和10.6%）。尽管特色鸡蛋和白壳鸡蛋的裂纹蛋百分比相似（分别为5.4%和5.7%），但特色鸡蛋的渗漏蛋百分比高出三倍（分别为1.0%和0.3%）。特色鸡蛋的价格大幅高于白壳鸡蛋，特色鸡蛋平均每打2.18美元，价格范围为0.88至4.38美元，而白壳鸡蛋平均每打1.23美元，价格范围为0.39至2.35美元。
