Table 2. Effects of different phytogenic feed additives on growth performance in growing-finishing pigs with stressed by stocking density¹⁾

Items	PC²⁾	NC	PT1	PT2	PT3	PT4	PT5	SEM	p-value
BW (kg)
Initial	28.00	27.53	27.64	28.97	28.62	28.48	27.88	0.309	0.868
4 w	56.30^ab	53.23^b	53.77^b	57.43^ab	59.35^a	57.04^ab	56.15^ab	0.592	0.083
Final	110.63^a	96.72^c	97.23^c	101.37^bc	109.43^a	106.41^ab	102.39^bc	0.767	< 0.001
0–4 w
ADG kg	0.98^ab	0.89^b	0.90^b	0.98^ab	1.06^a	0.98^ab	0.98^ab	0.014	< 0.001
ADFI (kg)	1.98^bc	2.03^abc	1.94^c	2.01^abc	2.06^ab	2.08^a	2.03^ab	0.012	< 0.001
G:F	0.49^ab	0.44^b	0.46^ab	0.49^ab	0.51^a	0.47^ab	0.48^ab	0.006	< 0.001
4–10 w
ADG (kg)	1.26^a	1.01^c	1.01^c	1.02^c	1.16^ab	1.15^b	1.08^bc	0.013	< 0.001
ADFI (kg)	2.92^a	2.54^c	2.82^ab	2.82^ab	2.88^ab	2.79^b	2.77^b	0.016	< 0.001
G:F	0.43^a	0.40^abc	0.36^c	0.36^c	0.41^ab	0.41^ab	0.39^bc	0.004	< 0.001
Overall period
ADG (kg)	1.16^a	0.97^e	0.98^e	1.02^de	1.14^ab	1.1^bc	1.05^cd	0.009	< 0.001
ADFI (kg)	2.58^a	2.29^c	2.41^b	2.43^b	2.46^b	2.43^b	2.41^b	0.012	< 0.001
G:F	0.45^ab	0.43^cd	0.41^d	0.42^cd	0.46^a	0.45^ab	0.44^bc	0.004	< 0.001

Each value is the mean value of 4 replicates.
PC, basal diet in animal welfare density; NC, basal diet in high stocking density; PT1, basal diet with PFA1 in high stocking density; PT2, basal diet with PFA2 in high stocking density; PT3, basal diet with PFA3 in high stocking density; PT4, basal diet with PFA4 in high stocking density; PT5, basal diet with PFA5 in high stocking density.
Means within column with different superscripts differ significantly (p < 0.05).
BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; G:F, feed efficiency; PFA, phytogenic feed additives.