Table 7. The effects of various stocking densities on feed conversion ratio of Korean native ducks

Treatments¹	14~28 d	28~42 d	42~50 d	14~50 d
T1	1.78	2.41	3.42^a	2.36^a
T2	1.77	2.31	3.35^a	2.31^a
T3	1.77	2.31	3.36^a	2.31^a
T4	1.75	2.33	2.78^b	2.21^b
T5	1.79	2.39	2.60^b	2.21^b
T6	1.80	2.28	2.77^b	2.20^b
SEM²	0.043	0.087	0.211	0.041
P-value	0.630	0.311	<0.05	<0.05

T1, 4 birds/m²; T2, 5 birds/m²; T3, 6 birds/m²; T4, 7 birds/m²; T5, 8 birds/m²; T6, 9 birds/m².
Standard error of mean.
Means with different superscripts in the same column differ significantly (P<0.05).