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鸡蛋颜色由什么决定?答案竟这么简单 - 站长搜索
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鸡蛋颜色由什么决定?答案竟这么简单

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2015-04-23 16:42:05 转载来源: 网络整理/侵权必删

鸡蛋壳的颜色由什么决定?答案简单得吓人:白色母鸡下白壳蛋。棕色母鸡下棕壳蛋

鸡蛋壳的颜色什么决定

答案简单得吓人:

白色母鸡下白壳蛋。

棕色母鸡下棕壳蛋。

白色母鸡和棕色母鸡区分的标准不是羽毛的颜色,而是耳垂的颜色。一般情况下,羽毛的颜色跟耳垂的颜色也是一致的。

还有各种不同种类的母鸡,会下各种不同颜色的鸡蛋。

蛋壳颜色取决于母鸡的种类,跟其它因素无关,更不是区分营养价值高低的标准。所有的蛋壳一开始都是白色的,在蛋壳形成阶段的后半段,一些种类的母鸡会分泌色素,让蛋壳变成不同的颜色。色素仅仅附着在外表面,剥开棕壳蛋,内表面依然是白色的。

为什么棕壳蛋普遍卖的比白壳蛋贵?

因为棕色母鸡普遍比白色母鸡的胃口好,吃的更多,需要更多的饲料,喂养成本更高,相应的产品价格也要更高。

为什么市面上好多山鸡蛋、柴鸡蛋都是棕壳蛋?

因为山鸡蛋、柴鸡蛋并没有明确的标准,只是市场营销手段,「养鸡场的白壳蛋的营养价值不如散养的棕壳蛋」这种说法可能也只是出于营销的需求。

为什么有人说棕壳蛋的蛋壳比白壳蛋更硬?

因为实验的其它变量没有控制。蛋壳硬度取决于母鸡的身体情况,而不是蛋壳颜色。拿一个年轻力壮的棕色母鸡的棕壳蛋,跟一个年老力衰的白色母鸡的白壳蛋对比,结果显然是有偏差的。

为什么有人说棕壳蛋的蛋黄更好、营养价值更大?

因为同样没有控制其它变量。蛋黄情况、营养价值取决于母鸡的情况,比如身体状况、饲料质量等等。同样喂养条件、同样身体情况的棕色母鸡和白色母鸡,鸡蛋的营养价值几乎相同,跟蛋壳颜色毫无关系。

鸡有耳垂吗?

标签: 鸡蛋 颜色 什么 决定 答案 这么 简单


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