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. 2021 Apr 21;99(6):skab127. doi: 10.1093/jas/skab127

Table 3.

Body weight and growth performance of pigs fed diets without Cu supplementation (control) or with 125, 250 mg/kg of Cu from CuSO₄ or Cu₂O¹

		CuSO₄		Cu₂O			P-value
Item	Control	125	250	125	250	SEM	Treatment
BW
Initial BW, kg	11.55	11.52	11.51	11.48	11.50	0.217	0.998
Phase 1², kg	28.46^b	29.52^ab	29.96^a	29.13^ab	30.05^a	0.744	0.036
Phase 2², kg	58.77^c	62.13^ab	62.79^ab	59.88^bc	64.31^a	1.551	0.007
Phase 3², kg	96.74^b	97.99^b	96.84^b	97.68^b	103.29^a	2.100	0.027
Phase 4², kg	117.21^b	117.94^b	115.96^b	117.44^b	123.23^a	2.268	0.032
ADG
Phase 1, kg/d	0.66^b	0.69^ab	0.71^a	0.68^ab	0.71^a	0.015	0.042
Phase 2, kg/d	0.87^b	0.93^ab	0.93^ab	0.88^b	0.98^a	0.027	0.026
Phase 3, kg/d	1.08^x	1.02^xy	1.01^y	1.07^x	1.09^x	0.035	0.083
Phase 4 kg/d	1.00	0.87	0.96	1.03	0.96	0.044	0.142
Overall, kg/d	0.89^y	0.91^xy	0.90^y	0.91^xy	0.95^x	0.019	0.092
ADFI
Phase 1, kg/d	1.02	1.08	1.07	1.05	1.08	0.026	0.173
Phase 2, kg/d	1.82^y	1.96^xy	1.99^x	1.89^xy	2.02^x	0.062	0.085
Phase 3, kg/d	2.68^ab	2.50^c	2.55^bc	2.52^c	2.76^a	0.065	0.005
Phase 4, kg/d	2.83	2.88	2.76	2.94	2.92	0.086	0.300
Overall, kg/d	2.17^b	2.16^b	2.14^b	2.17^b	2.33^a	0.055	0.034
G:F
Phase 1	0.649	0.651	0.660	0.648	0.651	0.0071	0.674
Phase 2	0.475	0.476	0.475	0.466	0.486	0.0058	0.170
Phase 3	0.404^b	0.404^b	0.394^b	0.426^a	0.394^b	0.0088	0.035
Phase 4	0.331	0.310	0.349	0.351	0.329	0.0178	0.303
Overall	0.421	0.421	0.419	0.421	0.409	0.0059	0.356

¹Data are means of 8 observations per treatment.

²Phase 1, days 1 to 26; phase 2, days 26 to 61; phase 3, days 61 to 96; and phase 4, days 96 to 116.

^a–cValues within a row without a common superscript are different (P < 0.05).

^xyValues within a row without a common superscript tend to be different (P < 0.10).