Table 2. Effect of stocking density on growth performance in broiler

Parameters	Stock density (birds/m2)				SEM1	P-values2
	26	22	19	16		Linear	Quadratic
Starter (0~21 d)
Weight gain (g/bird)	775	720	791	820	33.378	0.174	0.316
Feed intake (g/bird)	1,259a	1,142b	1,155b	1,147b	18.379	0.002	0.008
FCR (feed/gain)	1.50	1.51	1.35	1.30	0.085	0.059	0.908
Grower (22~35 d)
Weight gain (g/bird)	677c	812bc	898ab	1,070a	51.355	<0001	0.985
Feed intake (g/bird)	1,307d	1,531c	1,687b	1,999a	25.814	<0001	0.624
FCR (feed/gain)	1.93	1.96	1.90	1.89	0.129	0.754	0.918
Overall (0~35 d)
Weight gain (g/bird)	1,452c	1,533bc	1,690b	1,891a	42.335	<0001	0.414
Feed intake (g/bird)	2,566c	2,673c	2,842b	3,146a	30.082	<0001	0.035
FCR (feed/gain)	1.77	1.75	1.69	1.67	0.045	0.102	0.874

SEM, standard error of means.
Orthogonal contrasts: linear and quadratic effect of supplemental yeast culture.
Means in same rows with different superscripts are significantly different (P<0.05).