Table 2 Effects of Nano-Se on growth performance of broiler chickens.

Items	Se-NPs levels mg/kg				SEM	p-value
Items	0	0.2	0.3	0.4	SEM	Linear	Quadratic
Body weight, g
1 day	43.25	42.39	43.50	42.18	0.837	0.584	0.787
12 days	355.4^b	424.3^a	411.1^a	423.7^a	18.17	0.028	0.136
24 days	1060^b	1200^a	1247^a	1217^a	25.69	0.002	0.003
35 days	1862^c	2142^b	2285^a	2260^a	58.25	0.001	0.016
Body weight gain, g
1–12 days	312.1^b	381.9^a	367.6^a	381.5^a	18.05	0.026	0.137
13–24 days	705.4^b	771.8^a	836.1^a	794.1^a	23.62	0.005	0.032
24–35 days	801.7^c	941.43^b	1038^a	1042^a	59.43	0.005	0.268
1–35 days	1819^c	2099^b	2242^a	2218^a	57.95	0.001	0.017
Feed intake, g
1–12 days	466.7	485.3	501.3	470.3	21.74	0.784	0.267
13–24 days	1127^c	1101^c	1303^a	1184^b	38.35	0.042	0.240
24–35 days	1467	1505	1601	1527	76.00	0.424	0.469
1–35 days	3061^c	3092^c	3406^a	3182^b	86.79	0.039	0.158
Feed conversion ratio
1–12 days	1.499^a	1.274^c	1.368^b	1.244^c	0.056	0.014	0.045
13–24 days	1.613^a	1.434^c	1.561^b	1.495^c	0.067	0.458	0.052
24–35 days	1.838^a	1.609^b	1.569^b	1.469^c	0.068	0.001	0.057
1–35 days	1.683^a	1.476^c	1.519^b	1.433^c	0.039	0.008	0.064

SEM standard error of the means.
^a,bMeans within a row with different superscripts are significantly different (p < 0.05).

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