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名称:Cowboy
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建站时间:2010/1/22 11:36:27
 
 
 
标题:信鸽眼砂的识别选择及应用(下)
 
gdgs.xingechina.com     2009/5/8 20:45:47      Cowboy    已阅 157637 人次
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 眼砂是选育优良品种的重要依据之一
鸽子的眼砂内含有蓝敏色素、红敏色素、绿敏色素、白敏色素四种视色素。其功能是用于调节外界光线强弱的变化,使之适应并发挥鸽眼特有的作用。我现在把鸽眼的砂型作简单介绍,以供鸽友们选择眼砂和选 育信鸽时作参考。眼砂大体分两种,即砂眼类和黄眼类。下面分别向鸽友做简要介绍。
砂眼类
A、眼底砂有灰圈、白云云底、面砂呈粉红色。这种眼砂适于阴暗天气飞行。
B、瞳孔周围有云底、面砂桃红色。适于阴天飞行。
C、眼砂色居于云砂与桃红砂之间。属于阴天飞行型眼砂。
D、眼砂紫红、眼砂底部呈现蓝色、又称蓝水紫桃花砂。适宜阴天飞行。
上述四种型眼砂白色成分占多的,偏于阴暗天飞行;红色成分占多的,偏于强光照天气飞行。
黄眼类
A、黄与红两种砂色均匀配合,适于强光条件下与偏阴天飞行。
B、黄色底砂占主要成分,面砂略显少量飘撒状红砂。适于强光条件下或阴天飞行。
C、底砂和面砂均以红砂占主要成分。适于强光照天气飞行。
D、底砂以黄砂为主,面砂以红砂为主;黄、红砂各占一半,对等构成。适于艳阳天飞行。
在黄眼类中还包含着一个分支类型,笔者称其为“油豆绛砂”,简要介绍如下。
A、瞳孔周围有稀蓝色圈、面砂暗红而发紫色。属于夜间飞行型眼砂。
C、由黄、红、黑等色组成的褐色砂型。底砂金色发亮、面砂为暗棕色,瞳孔线口为黑色,各色均匀调合,属于“全天候”砂型。适宜“全天候”飞行。
D、瞳孔外围有绿色底砂,又附生黄色二层砂,虹膜外层被红砂所占据。属于艳阳天砂型。但经过训练也可在夜间或阴天飞行。(这四种不多见)
种鸽眼砂怎样选择?
   种鸽的眼砂必须层次分明,收缩放大迅速,眼环前厚后薄,眼球不能凸出眼环外,砂层要到底部,要干燥。
   黑线、黑褐线、绿线、云色线等种鸽的眼砂“线口”要宽。
   红砂、黄砂、云红砂、土红砂等种鸽也具备上述要求。
   种鸽在配对时,应尽量注意眼砂的深、浅、粗、细配合,最好是一深配一浅,一粗配一细。如红砂配土红砂,黄砂配绛砂,云红砂配油眼砂。目的是为了产生“多层次砂”,适应“全天气候”。“单层次砂”只能适应一种天气。有人认为,信鸽眼部带有“黑色阴影”的能在阴天迅速准确地归巢,这点值得引起鸽友注意。


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