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. 2020 Mar 20;99(5):2375–2384. doi: 10.1016/j.psj.2020.01.013

Table 4.

Comparison of performance traits between low, middle, and high RFI levels.1

Categories Low RFI(n = 559)
Middle RFI(n = 559)
High RFI(n = 559)
Mean SD Mean SD2 Mean SD
General traits
 Average body weight at day 21, kg 1.25a 0.21 1.26a 0.21 1.27a 0.13
 Average body weight at day 42, kg 3.35A 0.25 3.30B 0.21 3.36A 0.21
 Body weight gain, kg 2.10A 0.24 2.04B 0.25 2.09A 0.19
 Daily body weight gain, kg/D 0.11A 0.01 0.10B 0.01 0.10B 0.01
 Feed intake, kg 4.58C 0.51 5.34B 0.48 6.18A 0.41
 Residual feed intake, kg −0.86C 0.26 0.02B 0.03 0.76A 0.17
 Feed conversion ratio 2.18C 0.13 2.63B 0.09 2.96A 0.12
Feeding behavior traits
 Total feeding time, min 198.72B 52.19 225.28A 48.49 231.51A 39.66
 Daily feed intake, kg/D 0.25C 0.03 0.28B 0.02 0.30A 0.02
 Meal feed intake, g 33.93B 7.24 34.00B 6.39 36.63A 6.35
 Visit duration, s 72.32a 21.74 70.59a 17.31 69.54a 14.87
 Meal duration, s 87.68a 27.13 83.32a 21.84 81.69b 18.29
 Average interval between meals, min 195.25A 43.84 170.16B 30.22 170.05B 28.54
 Daily feeding rate, g/min 24.20B 5.08 25.38B 5.11 27.54A 4.61
 Number of meals per day 7.51B 1.60 8.49A 1.54 8.45A 1.39
 Number of visits per day 9.13B 2.09 10.04A 2.19 9.94A 1.83

A,B,a,b,CDifferent letters in the same row mean significant differences between different groups. Capital: P < 0.01; Lowercase: P < 0.05.

1

RFI, Residual Feed Intake.

2

SD, standard deviation.