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Table 2 Laying performance of duck breeders from 38 to 77 wk of aged

From: Effect of dietary canthaxanthin and 25-hydroxycholecalciferol supplementation on the performance of duck breeders under two different vitamin regimens

Vitamin level CX + 25-OH-D3 Daily laying rate, % Daily feed intake, g Egg weight, g Total egg mass, kg Feed: egg, kg:kg Cracked eggs, % Pigmentation of malese
Bill Shank
REGULAR - 82.7 239 92.1 21.3 3.80 1.4ab 7.6 10.4
REGULAR + 81.2 236 91.6 20.8 3.82 1.3b 10.7 14.7
HIGH - 83.9 239 92.1 21.6 3.74 1.5a 7.8 10.8
HIGH + 82.6 237 92.5 21.4 3.74 1.1c 11.0 14.9
SEM   0.7 1.0 0.2 0.2 0.03 0.04 0.5 0.6
P-value
     Vitamin 0.373 0.831 0.216 0.324 0.297 0.305 0.065 0.062
     CX + 25-OH-D3 0.366 0.179 0.885 0.409 0.900 0.001 <0.001 <0.001
     Vitamin × (CX + 25-OH-D3) 0.946 0.737 0.168 0.763 0.821 0.038 0.794 0.419
  1. a-c Different superscripts in a row indicate differ significantly (P ≤ 0.05)
  2. d CX canthaxanthin, 25-OH-D 3 25-hydroxycholecalciferol
  3. e Mean of 7 times of color measure at wk 4, 8, 12, 16, 24, 32 and 40 of the trial