Table 7.

Effects of dietary Se sources on organ indexes of laying hens.

Itemsa, ‰	Ctrl	Norm	SS	SEY	SEIP	SEM	P-value
Liver	18.46	18.87	18.21	18.08	18.75	0.79	0.95
Heart	3.49	3.98	3.52	3.83	3.57	0.17	0.18
Spleen	1.47	1.43	1.28	1.23	1.30	0.15	0.76

^aData are the mean of eight replicates; The organ index was calculated as organ weight/ Live body weight. SEM, standard error of mean; Ctrl, the birds fed the basal diet; Norm, the birds fed 0.3 mg/kg of Se provided by sodium selenite; SS, SEY, and SEIP, the birds fed 2 mg/kg of Se provided by sodium selenite, Se yeast, and Se-enriched insect protein powder, respectively.