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

Table 5.

Effects of free-range days on lymphoid organ indices of Wannan Yellow chickens.¹

	Free-range days
Items	0	14	28	42	SEM²	Significance	Linear	Quadratic
Liver weight (g)	25.99	24.52	23.86	25.51	0.179	0.403	0.628	0.113
(liver weight/BW) × 100	2.45	2.41	2.52	2.67	0.047	0.048	0.081	0.115
Spleen weight (g)	2.41	2.24	2.13	2.58	0.109	0.364	0.215	0.440
(spleen weight/BW) × 100	0.22	0.21	0.22	0.26	0.011	0.376	0.414	0.873
Thymus weight (g)	4.06^a	4.81^a	5.51^b	5.43^b	0.205	0.013	0.653	0.017
(Thymus weight/BW) × 100	0.33^a	0.40^a	0.52^b	0.51^b	0.019	0.034	0.901	0.021
Bursa weight (g)	1.66	1.73	1.92	1.93	0.106	0.115	0.161	0.217
(Bursa weight/BW) × 100	0.15	0.16	0.18	0.19	0.001	0.129	0.091	0.221

^¹

Data are means of 6 replicates of 8 chickens each.

^²

Pooled standard error of the mean.

^{^a−c}

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