Table 3. Effects of dosage level of phytogenic feed additives on nutrient digestibility in growing-finishing pigs with stressed by stocking density

Items	NC	High stocking density							SEM	p-value
Items	NC	PC	ES1 (0.05%)	ES2 (0.10%)	CES1 (0.10%)	CES2 (0.20%)	GP1 (0.04%)	GP2 (0.08%)	SEM	p-value
2 week (%)
DM^{1),2),3),4),5),6),7),8)}	85.17^ab	81.65^d	84.08^bc	83.34^c	86.40^a	83.31^c	84.98^ab	85.43^ab	0.31	< 0.001
CP^{1),2),3),4),5),8)}	75.58^a	70.91^c	74.42^ab	73.39^b	74.77^ab	74.55^ab	73.46^b	73.70^b	0.20	< 0.001
GE^{1),2),3),4),5),8)}	78.79^bc	76.74^cd	78.64^bc	77.04^bcd	81.07^a	74.98^d	78.88^b	78.85^b	0.38	< 0.001
8 week (%)
DM^{1),2),3),4),5),7),8)}	85.67^a	80.15^d	82.88^c	84.46^ab	85.24^ab	84.96^ab	84.26^b	82.28^c	0.23	< 0.001
CP^{1),2),3),4),5),6),7)}	76.67^a	67.14^c	70.19^b	70.05^b	76.78^a	75.47^a	71.04^b	71.15^b	0.41	< 0.001
GE^{1),2),3),4),5),7),8)}	78.35^a	69.65^c	76.98^ab	77.07^ab	78.16^a	78.44^a	76.38^ab	73.82^b	0.64	< 0.001

Contrast: NC vs PC (p < 0.05).
Contrast: PC vs Other treatments (p < 0.05).
Contrast: PC vs Essential oil (p < 0.05).
Contrast: PC vs Mixture of bitter citrus extract and essential oil (p < 0.05).
Contrast: PC vs Grape pomace extract (p < 0.05).
Contrast: Essential oil vs Mixture of bitter citrus extract and essential oil (p < 0.05).
Contrast: Essential oil vs Grape pomace extract (p < 0.05).
Contrast: Mixture of bitter citrus extract and essential oil vs Grape pomace extract (p < 0.05).
Means with different letters are significantly differ (p < 0.05) or tend to differ (0.05 ≤ p < 0.10).
NC, basal diet in animal welfare density; PC, basal diet in high stocking density; ES1, basal diet with essential oil 0.05% in high stocking density; ES2, basal diet with essential oil 0.10% in high stocking density; CES1, basal diet with mixture of bitter citrus extract and essential oil 0.10% in high stocking density; CES2, basal diet with mixture of bitter citrus extract and essential oil 0.20% in high stocking density; GP1, basal diet with grape pomace extract 0.04% in high stocking density; GP2, basal diet with grape pomace extract 0.08% in high stocking density; DM, dry matter; CP, crude protein; GE, gross energy.