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. 2020 Aug 26;99(11):5844–5857. doi: 10.1016/j.psj.2020.08.017

Table 3.

Body weight gain (BWG, kg), feed intake (FI, kg), and feed conversion ratio (FCR) from 0 to 6, 7 to 14, and 0 to 14 d postinoculation (dpi) according to dietary digestible Arg levels (1.04, 1.14, 1.24, 1.34, and 1.44%) in broilers challenged (Cha) or unchallenged (Unch) with a mixed Eimeria spp. infection.

Challenge Arg 0–6 dpi
 7–14 dpi
 0–14 dpi
BWG FI FCR BWG FI FCR BWG FI FCR
Cha 1.04 0.22 0.39 1.75 0.46 0.78 1.69 0.68 1.17 1.71
1.14 0.22 0.38 1.75 0.51 0.79 1.56 0.73 1.18 1.62
1.24 0.22 0.39 1.73 0.52 0.84 1.64 0.74 1.23 1.67
1.34 0.22 0.39 1.79 0.51 0.81 1.58 0.75 1.23 1.64
1.44 0.24 0.40 1.67 0.51 0.83 1.63 0.74 1.22 1.68
Unch 1.04 0.29 0.41 1.44 0.54 0.86 1.61 0.82 1.27 1.55
1.14 0.29 0.44 1.42 0.54 0.85 1.56 0.83 1.28 1.50
1.24 0.30 0.42 1.47 0.56 0.85 1.52 0.86 1.29 1.50
1.34 0.29 0.42 1.43 0.54 0.85 1.50 0.83 1.29 1.47
1.44 0.30 0.44 1.45 0.57 0.87 1.52 0.87 1.32 1.50
Challenge Cha 0.22b 0.39b 1.74a 0.50b 0.81b 1.62a 0.73b 1.20b 1.66a
Unch 0.29a 0.42a 1.44b 0.55a 0.86a 1.54b 0.84a 1.29a 1.50b
Arg 1.04 0.25 0.40 1.60 0.50 0.82 1.65a 0.75b 1.22 1.63a
1.14 0.26 0.41 1.58 0.53 0.82 1.56a,b 0.78a,b 1.23 1.56b
1.24 0.26 0.40 1.60 0.54 0.85 1.58a,b 0.80a,b 1.26 1.58a,b
1.34 0.26 0.40 1.61 0.52 0.83 1.54b 0.79a,b 1.26 1.55b
1.44 0.27 0.42 1.56 0.54 0.85 1.57a,b 0.81a 1.27 1.59a,b



SEM Challenge 0.004 0.005 0.026 0.011 0.012 0.024 0.013 0.015 0.017
Arg 0.002 0.003 0.015 0.006 0.007 0.014 0.007 0.008 0.010
Interaction 0.002 0.002 0.010 0.004 0.005 0.009 0.005 0.006 0.007



P-value Challenge <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001
Arg 0.192 0.122 0.671 0.089 0.303 0.018 0.039 0.113 0.022
L1 0.046 0.039 0.482 0.026 0.084 0.026 0.005 0.011 0.124
Q1 0.250 0.875 0.441 0.256 0.986 0.040 0.287 0.502 0.080
Interaction 0.822 0.287 0.306 0.531 0.325 0.421 0.535 0.861 0.810
L × Unch2 0.290 0.101 0.822 0.166 0.805 0.020 0.058 0.183 0.082
L × Cha2 0.075 0.188 0.223 0.074 0.029 0.373 0.034 0.022 0.655
Q × Unch3 0.964 0.657 0.932 0.762 0.298 0.150 0.993 0.968 0.158
Q × Cha3 0.116 0.523 0.257 0.060 0.306 0.134 0.145 0.370 0.078

a,bMeans followed by superscript letters are different by Tukey's test (P < 0.05) within the column.

1

L, Linear effect; Q, Quadratic effect.

2

L at Unch—Linear effect of Arg on unchallenged birds; L at Cha–Linear effect of Arg on challenged birds.

3

Q at Unch—Quadratic effect of Arg on unchallenged birds; Q at Cha–Quadratic effect of Arg on challenged birds.