Skip to main content

Table 2 Effects of dietary methionine level on growth performance of Pekin ducks from 15 to 42 days of age

From: Dietary methionine deficiency stunts growth and increases fat deposition via suppression of fatty acids transportation and hepatic catabolism in Pekin ducks

Dietary Met level, % ADG, g ADFI, g FCR Met intake, g/d/bird Met intake/ADG
0.28 86.7±2.6b 186.2±7.9 2.15±0.06a 0.52±0.02e 5.95±0.16e
0.35 89.1±3.6a,b 176.7±10.2 1.98±0.06b 0.62±0.04d 6.97±0.20d
0.43 93.4±2.6a 179.1±8.2 1.92±0.04c 0.76±0.03c 8.19±0.16c
0.50 90.8±3.0a,b 175.5±7.2 1.94±0.04b,c 0.88±0.04b 9.70±0.19b
0.58 91.8±4.6a 177.0±9.6 1.93±0.04b,c 1.02±0.06a 11.12±0.25a
P value
 Met 0.024 0.259 <0.001 <0.001 <0.001
 Met linear response 0.014   <0.001 <0.001 <0.001
 Met quadratic response 0.077   <0.001 0.489 0.001
  1. a–e Means within a column with no common superscripts differ significantly (P < 0.05)
  2. Values are the means of 6 replicates of 5 ducks
  3. ADG, average daily gain; ADFI, average daily feed intake; FCR, feed conversion ratio (feed: gain); Met, methionine