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

Table 7.

Apparent ileal digestibility of dry matter (AIDDM, %), crude protein (AIDCP, %), and energy (AIDE, %) at 6 and 14 d postinoculation (dpi) according to dietary 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 6 dpi
 14 dpi
AIDDM AIDCP AIDE AIDDM AIDCP AIDE
Cha 1.04 63.22 75.11 2,305.20 69.45 79.12 2,701.00
1.14 62.05 74.82 2,253.45 69.78 79.12 2,684.81
1.24 64.72 78.59 2,376.93 71.00 81.31 2,764.18
1.34 63.22 75.27 2,335.35 69.53 79.65 2,711.51
1.44 65.87 76.88 2,413.15 68.71 77.040 2,679.66
Unch 1.04 70.96 81.60 2,709.45 72.07 82.22 2,841.8
1.14 68.42 80.20 2,593.32 72.40 81.42 2,830.75
1.24 70.53 81.30 2,699.75 74.60 83.88 2,922.61
1.34 70.51 81.63 2,703.24 72.03 80.85 2,851.58
1.44 69.73 81.02 2,648.25 68.86 80.65 2,699.11
Challenge Cha 63.82b 76.13b 2,336.81b 69.70b 79.25b 2,708.23b
Unch 70.03a 81.15a 2,670.80a 71.99a 81.80a 2,829.18a
Arg 1.04 67.09 78.36 2,507.33 70.76 80.67 2,771.43
1.14 65.23 77.51 2,423.38 71.09 80.27 2,757.78
1.24 67.63 79.95 2,538.34 72.80 82.59 2,843.39
1.34 66.87 78.45 2,519.29 70.78 80.25 2,781.55
1.44 67.80 78.95 2,530.70 68.79 78.84 2,689.38



SEM Challenge 1.226 0.708 0.904 0.829 37.518 1.226
Arg 0.708 0.447 0.522 0.478 21.661 0.708
Interaction 0.500 0.316 0.369 0.338 15.316 0.500



P-value Challenge <0.001 <0.001 <0.001 0.007 0.002 <0.001
Arg 0.665 0.333 0.570 0.058 0.077 0.075
L1 0.467 0.407 0.408 0.146 0.203 0.231
Q1 0.625 0.684 0.780 0.017 0.049 0.030
Interaction 0.854 0.452 0.848 0.742 0.905 0.657
L × Unch2 0.948 0.940 0.959 0.102 0.360 0.112
L × Cha2 0.276 0.273 0.224 0.672 0.371 0.922
Q × Unch3 0.843 0.853 0.946 0.180 0.371 0.250
Q × Cha3 0.621 0.455 0.744 0.306 0.063 0.403

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.