. 2020 Nov 2;100(2):820–834. doi: 10.1016/j.psj.2020.10.046

Table 5.

Effects of xylanase (XL) level and its interactions with amino acid (AA) density (10% difference) and additional fat (AF) postpellet in corn-soybean diets with dried distillers grains with solubles for Ross 708 male broilers on feed conversion ratio (FCR) from 1 to 49 d of age.

Item 1	Item 2	FCR, g:g
Item 1	Item 2	1–17 d	1–35 d	1–42 d	1–49 d
XL, BXU/kg
0		1.293	1.527^a,b	1.658	1.787
8,000		1.283	1.522^b	1.655	1.788
16,000		1.279	1.523^b	1.658	1.794
32,000		1.287	1.544^a	1.664	1.794
AA density, %
Low		1.301^a	1.540^a	1.670^a	1.799^a
High		1.269^b	1.518^b	1.647^b	1.783^b
AF, %
0		1.299^a	1.544^a	1.673^a	1.809^a
1.17		1.271^b	1.514^b	1.644^b	1.772^b
AA density × AF
Low	0	1.315	1.551	1.681	1.810^a
	1.17	1.288	1.528	1.660	1.788^b
High	0	1.284	1.536	1.666	1.808^a,b
	1.17	1.255	1.501	1.628	1.757^c
Pooled SEM (n = 6)¹		0.004	0.004	0.005	0.005
CV, %		1.68	1.60	1.54	1.55
Effect, P-value²
XL		0.148	0.009	0.715	0.740
AA density		<0.001	<0.001	<0.001	0.006
AF		<0.001	<0.001	<0.001	<0.001
XL × AA density		0.834	0.449	0.701	0.291
XL × AF		0.728	0.463	0.194	0.061
AA density × AF		0.816	0.255	0.119	0.015
XL × AA density × AF		0.098	0.112	0.003	0.469
Linear regressions for XL
Linear		0.021	0.175	0.788	0.589
Quadratic		0.018	0.028	0.581	0.788
R²		0.56	0.49	0.43	0.46
R² adjusted		0.49	0.41	0.33	0.37

^a–cMeans within a column, not sharing a common superscript, are significantly different (P < 0.05).

Six replicate pens of 22 broilers each per treatment.

Only means for significant interactions are showed (P < 0.05). Moreover, XL × AA density × AF interaction was significant (P < 0.05) from 1 to 42 d of age (see Figure 1).