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. 2020 Mar 18;99(5):2595–2607. doi: 10.1016/j.psj.2019.12.051

Table 3.

Main effects of diet and age on performance in hens fed with different dietary aP and Ca levels and phytase supplementation from 25–37 wk of age.

Body weight1,2 (kg)
 Feed intake1 (g/day per hen)
 Feed conversion ratio1 (kg feed/dozen eggs)
 Hen-day egg production1,3 (%)
 Total egg number1,4
LSM5 SEM6 LSM5 SEM6 LSM5 SEM6 LSM5 SEM6 LSM5 SEM6
Diet7
 PC 1.64 0.01 108 1.29 1.27 0.02 98.2 0.51 82.6 0.63
 NC 1.62 0.02 110 1.46 1.31 0.02 97.6 0.75 81.9 0.58
 NC + 150 1.65 0.02 111 1.13 1.29 0.01 98.9 0.31 83.3 0.39
 NC + 300 1.65 0.02 109 1.03 1.27 0.01 99.0 0.30 83.4 0.36
 NC + 600 1.59 0.02 107 1.26 1.26 0.02 98.5 0.39 82.8 0.39
 NC + 1,200 1.65 0.02 110 1.02 1.29 0.01 97.4 0.67 82.0 0.79
 PC + 1,200 1.61 0.02 108 1.36 1.27 0.02 98.4 0.50 82.8 0.41
Age
 25–29 wk 1.62 0.01 109 0.92 1.23c 0.01 98.1 0.39 - -
 29–33 wk 1.62 0.01 108 0.59 1.27b 0.01 98.4 0.33 - -
 33–37 wk 1.62 0.01 111 0.87 1.34a 0.01 98.4 0.29 - -
 37 wk 1.66 0.02 - - - - - - - -
Source of variation Prob > F
 Diet 0.104 0.309 0.328 0.439 0.334
 Age 0.198 0.080 <0.001 0.924 -
 Diet × age 0.999 0.998 0.999 0.947 -

a-cMeans within column with no common superscript differ significantly (P ≤ 0.05).

1

Means of 12 replicates of 1 hen for each treatment.

2

Age means for body weight were measured at the beginning of each specific age range (25, 29, 33, and 37 wk of age).

3

Arcsine transformation was used before statistical analysis; egg production data are presented as original values in percent.

4

Total egg produced throughout 84 D of experiment.

5

LSM = least squares mean.

6

SEM = standard error of the mean.

7

PC, a positive control diet, nutritionally complete diet containing 0.45% aP, 3.70% Ca, and 0.16% Na (25–28 wk) and 0.38% aP, 3.73% Ca, and 0.15% Na (29–37 wk); NC, a negative control diet, similar to the PC diet but having 0.22% aP, 3.00% Ca, and 0.13% Na (25–28 wk) and 0.19% aP, 3.02% Ca, and 0.13% Na (29–37 wk); NC + 150, NC + 300, NC + 600, and NC + 1,200, the NC diet supplemented with 150, 300, 600, or 1,200 FTU Quantum Blue phytase (AB Vista, Marlborough, UK)/kg, respectively; and PC + 1,200, the PC diet supplemented with 1,200 FTU Quantum Blue phytase/kg.