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. 2020 Jan 29;99(3):1528–1539. doi: 10.1016/j.psj.2019.11.018

Table 7.

Effect of phytase and xylanase supplementation individually or in combination on ileal digestibility of nutrients at different ages in broiler chickens1.

Age, D Phytase, FTU/kg Xylanase, BXU/kg DM Ca Na Mg Cu Fe Mn Zn K P N
Means for age × phytase interaction
 7 500 68.1 69.8 −4.8 24.1c 29.8 22.9 30.4 31.3 72.9 72.0 78.5d
1,500 68.7 68.5 10.3 26.4c 23.0 21.5 28.4 30.4 72.8 78.4 79.6c,d
3,000 68.9 70.8 19.8 28.1bc 30.6 24.0 31.9 32.2 74.7 83.6 80.8c
 28 500 73.3 57.1 −2.7 34.1a 28.4 31.1 20.6 31.8 80.1 67.8 84.4a
1,500 72.8 55.6 −1.1 32.6a,b 31.9 26.3 18.9 27.3 81.1 70.6 83.9a,b
3,000 70.6 53.8 1.2 26.1c 23.8 25.8 18.1 25.8 78.3 73.3 82.7b
Least significant difference 2.9 5.6 17.1 5.5 12.6 5.2 5.0 4.3 3.4 3.6 1.7
Means for phytase × xylanase interaction
500 0 69.9a,b 62.7 −17.4b 28.2 20.8b 26.3 23.6b,c 30.9 75.2 69.8 80.8
500 16,000 71.5a 64.3 10.0a 30.0 37.4a 27.8 27.4a,b 32.3 77.9 70.0 82.1
1,500 0 71.2a 59.7 5.9a 31.2 22.3b 23.3 22.7b,c 29.2 75.9 73.6 81.7
1,500 16,000 70.2a 64.5 3.3a 27.8 32.6a,b 24.5 24.6a-c 28.6 77.9 75.4 81.8
3,000 0 67.2b 64.1 8.6a 24.1 31.9a,b 25.0 28.7a 29.8 73.4 80.0 80.7
3,000 16,000 72.3a 60.6 12.4a 30.1 22.5b 24.8 21.3c 28.2 79.6 76.9 82.8
Least significant difference 2.9 5.6 17.1 5.5 12.6 5.2 5.0 4.3 3.4 3.6 1.7
Means for the simple effect of age × phytase × xylanase
 7 500 0 66.7 69.4 −22.2 22.3 15.1 23.5 29.7 31.6 71.0 71.8 77.8
500 16,000 69.5 70.2 12.5 25.8 44.6 22.4 31.1 31.0 74.9 72.3 79.3
1,500 0 67.9 66.2 10.8 27.1 15.1 19.2 28.8 31.1 70.6 76.3 78.9
1,500 16,000 69.4 70.9 9.8 25.7 30.9 23.9 28.1 29.7 74.9 80.5 80.3
3,000 0 66.9 72.4 17.0 27.2 34.3 23.0 34.8 32.8 73.0 85.8 79.6
3,000 16,000 71.0 69.3 22.7 29.0 27.0 25.0 29.1 31.6 76.4 81.5 82.0
 28 500 0 73.1 55.9 −12.7 34.0 26.6 29.1 17.5 30.1 79.4 67.9 83.9
500 16,000 73.5 58.3 7.4 34.2 30.2 33.2 23.6 33.5 80.8 67.7 84.9
1,500 0 74.6 53.1 1.0 35.3 29.4 27.5 16.7 27.2 81.3 70.9 84.4
1,500 16,000 70.9 58.0 −3.2 29.8 34.4 25.1 21.1 27.5 80.9 70.3 83.3
3,000 0 67.6 55.7 0.3 21.1 29.5 27.0 22.7 26.7 73.9 74.3 81.8
3,000 16,000 73.7 51.8 2.1 31.2 18.0 24.6 13.5 24.9 82.7 72.3 83.6
Least significant difference 4.0 7.9 24.1 7.8 17.8 7.4 7.1 6.0 4.8 5.2 2.4
P-values for main effects and interactions2
 Age <0.001 <0.001 0.066 0.004 0.960 0.002 <0.001 0.019 <0.001 <0.001 <0.001
 Phytase 0.592 0.755 0.070 0.442 0.902 0.243 0.565 0.144 0.930 <0.001 0.875
 Xylanase 0.025 0.556 0.059 0.365 0.121 0.596 0.683 0.845 0.001 0.708 0.019
 Age × phytase 0.213 0.479 0.231 0.011 0.214 0.246 0.434 0.091 0.137 0.069 0.005
 Age × xylanase 0.282 0.916 0.468 0.923 0.071 0.505 0.472 0.505 0.772 0.619 0.230
 Phytase × xylanase 0.013 0.118 0.039 0.065 0.016 0.896 0.006 0.630 0.191 0.179 0.269
 Age × phytase × xylanase 0.205 0.952 0.871 0.227 0.487 0.232 0.424 0.762 0.097 0.414 0.620

a-cValues in the same column with different letters are significantly different (P < 0.05).

1

Data are means of 10 birds (day 7) and 5 birds (day 28) per pen with 8 pens per treatment.

2

For clarity in the table, the means for some main effects and 2-way interactions were not presented in the table but could be computed from the data on 3-way interaction.