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. 2025 Aug 8;12:1611967. doi: 10.3389/fvets.2025.1611967

Table 6.

Individual bird body weight (kg) estimates for broiler breeder pullets reared on one of four feed and water provision treatments in a 2 × 2 factorial design1.

Week Treatment SEM2 P-values
ED + ADLIB ED + WR SAD + ADLIB SAD + WR Feed Water Feed × Water
3 0.56 0.54 0.55 0.55 0.019 0.84 0.56 0.83
4 0.59 0.57 0.58 0.58 0.017 0.84 0.63 0.83
5 0.64 0.62 0.63 0.62 0.019 0.84 0.57 0.89
6 0.69 0.68 0.69 0.68 0.021 0.94 0.80 0.87
7 0.75 0.76 0.76 0.76 0.021 0.78 0.80 0.78
8 0.85a 0.89a 0.80b 0.85b 0.016 0.046* 0.089 0.99
9 0.94 0.95 0.92 0.93 0.024 0.66 0.64 0.82
10 1.02 1.04 1.02 1.01 0.027 0.97 0.60 0.62
11 1.11 1.10 1.09 1.07 0.025 0.63 0.92 0.71
12 1.23a 1.23a 1.15b 1.20b 0.019 0.012* 0.88 0.18
13 1.33a 1.34a 1.23b 1.32b 0.021 0.0073* 0.59 0.14
14 1.43 1.41 1.34 1.41 0.027 0.053 0.69 0.15
15 1.54 1.60 1.53 1.51 0.037 0.86 0.24 0.26
16 1.69 1.75 1.67 1.64 0.038 0.72 0.23 0.24
17 1.89a 1.86a 1.67b 1.71b 0.024 <0.0001* 0.42 0.14
18 2.08a 1.95b 1.79d 1.87c 0.024 <0.0001* 0.0023* 0.0010*
19 2.18a 2.16a 1.95b 2.08b 0.037 0.0008* 0.69 0.061
20 2.30a 2.35a 2.09b 2.19b 0.050 0.011* 0.52 0.60
21 2.41b 2.54ab 2.63a 2.57ab 0.043 0.0035* 0.052 0.044*
22 2.58b 2.71b 2.72a 2.75a 0.042 0.040* 0.053 0.27

1Feeding treatments consisted of skip-a-day (SAD) and every-day (ED) feeding programs, while water provision treatments consisted of water restriction for 3 h during the 8 h photoperiod (WR) or ad libitum (ADLIB) access to water during the 8 h photoperiod.

2SEM, standard error of the mean.

Superscripts differing within a row indicate statistically significant differences (p < 0.05).

* indicates p < 0.05.