The Importance Of Early Feed For Chicks

monica · 發表于 2007-5-30 22:29:09

      Early feed intake：Moran (1996)

         Immediate 立即采食       24 h Post-hatch出殼后24小時
21 d

BW 體重          674a                      598 b

FCR 飼料轉化率 1.64                      1.65
42 d
BW                1479                      1442

FCR                1.94                      1.94
Mortality % 死亡率    3.8a                7.0b

Advice:
Stimulate feed and water intake of
ASAP盡快誘食及飲水

The facts事實
Chicks at hatch are not yet mature and are still in a late embryonic phase
剛出殼的雛雞并沒有完全成熟,仍處于胚胎后期

Chicks undergo a transition stage of 24 to 48h before having access to feed
在采食飼料前,雛雞仍需要24-48小時的過渡階段

It is common the chicks are stressed and dehydrated 1st week mortality can be as high as 3 to 4%.
在出殼后的第一周,應激或脫水會造成3%-4%的死亡率.

Early feeding of chicks not only has a permanent effect on body weight and carcass development, but also is critical for a good development of the immune system.
早期飼喂,不僅對體重和胴體質量有長遠影響,而且對良好免疫系統的發育也很關鍵.

The effect of feed restriction on the immune response (Afzal e.a., 1999)
      Restricted 限飼       Ad lib自由采食

Aleolair macrophages (%)
      27.1 - 42.9          75.5 - 84.9
Fagocytose-activity
      16.2 - 19.2          68.5 - 82.5
Bactericidal capacity(E.Coli)
      16.4 - 18.3          25.8 - 41.9

[ 本帖最后由 monica 于 2007-5-30 22:35 編輯 ]