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. 2019 Dec 17;98(12):6602–6610. doi: 10.3382/ps/pez504

Table 2.

Effects of free-range days on body weight, daily weight gain, daily feed intake, feed conversion ratio, and mortality.¹

	Free-range days
Items²	0	14	28	42	SEM³	P-value	Linear	Quadratic
BW (g)
70 D	665.87^a	665.87^a	665.87^a	629.48^b	10.244	0.024	–	–
84 D	840.46^a	840.46^a	796.93^b	785.03^c	9.644	0.035	0.036	0.552
98 D	1073.83	1055.74	1047.63	1077.70	11.304	0.118	0.201	0.588
56 to 70 D
ADG (g/D)	13.59^a	13.59^a	13.59^a	10.89^b	0.238	0.011	–	–
ADFI (g/D)	53.98^a	53.98^a	53.98^a	52.13^b	0.295	0.024	–	–
FCR (g/g)	3.97^a	3.97^a	3.97^a	4.79^b	0.068	0.023	–	–
71 to 84 D
ADG (g/D)	13.23	13.23	12.70	13.31	0.293	0.253	0.120	0.083
ADFI (g/D)	55.23	55.23	53.11	55.09	0.484	0.312	0.302	0.123
FCR (g/g)	4.17	4.17	4.18	4.14	0.196	0.213	0.535	0.195
85 to 98 D
ADG (g/D)	14.01^a	14.51^b	15.29^c	15.87^c	0.110	0.011	0.010	0.001
ADFI (g/D)	62.29^a	62.30^a	63.99^b	65.89^c	0.648	0.021	0.005	0.003
FCR (g/g)	4.45^a	4.29^b	4.19^c	4.15^c	0.026	0.030	0.011	0.584
56 to 98 D
ADG (g/D)	12.53	12.58	12.13	12.01	0.330	0.6351	0.4828	0.565
ADFI (g/D)	58.17	57.50	55.70	56.45	0.450	0.4536	0.4726	0.4862
FCR (g/g)	4.64	4.53	4.59	4.70	0.090	0.5648	0.2835	0.4791
Mortality(%)	1.10	1.78	2.21	1.12	0.010	0.6870	0.3860	0.5652

^¹

Data are means of 6 replicates of 37 birds each.

^²

ADG = average daily gain; ADFI = average daily feed intake; FCR = feed conversion ratio.

^³

Pooled standard error of the mean.

^{^a−d}

Means within a row lacking a common superscript differ significantly (P < 0.05).