Metabolizable energy, nitrogen balance, and ileal digestibility of amino acids in quality protein maize for pigs

Table 4 Energy metabolizability and nitrogen balance: experiment 1 ¹

Traits	QPM²					Maize			Contrast
	QPM1	334Ce	537Ta	537Ig	538Ta	White	Yellow	SEM³	QPM	Normal	Prob⁴
Dry Matter, kg/d
Intake	1.67^a	1.66^a	1.66^a	1.68^a	1.64^a	1.66^a	1.55^b	0.010	1.66	1.60	0.05
Energy, MJ/d
Intake	29,9^a	29.7^a	29.7^a	30.2^a	29.5^a	29.7^a	27.7^b	0.17	29.8	28.7	0.63
In feces	3.1^a	3.2^a	3.0^a	2.9^ab	2.9^ab	2.6^b	2.6^b	0.04	3.0	2.6	0.001
Digestible	26.8^a	26.5^a	26.7^a	27.3^a	26.5^a	27.1^a	25.1^b	0.16	26.7	26.1	0.01
In Urine	0.50	0.58	0.53	0.60	0.62	0.60	0.61	0.013	0.57	0.60	0.21
Metabolizable	26.3^a	25.9^a	26.2^a	26.7^a	25.9^a	26.5^a	24.5^b	0.16	26.2	25.5	0.01
Nitrogen, g/d
Intake	22.4^b	24.6^a	24.5^a	24.6^a	24.4^a	22.0^b	22.1^b	0.13	24.0	22.0	0.001
In feces	3.6	4.1	3.8	3.7	3.8	3.4	3.5	0.08	3.82	3.46	0.32
Digestible	18.7^b	20.5^a	20.6^a	20.4^a	20.5^a	18.5^b	18.6^b	0.35	20.1	18.6	0.001
In Urine	10.2^a	12.6^b	13.2^b	11.9^b	12.0^b	12.1^b	12.2^b	0.21	11.97	12.2	0.74
Retained	8.5^a	7.9^ab	7.5^ab	8.5^a	8.5^a	6.5^ab	6.4^b	0.24	8.18	6.44	0.19
Dry matter, MJ/kg
Digestible energy	16.11^cd	15.96^d	16.12^bcd	16.29^ab	16.18^abc	16.34^a	16.22^abc	0.007	16.13	16.28	0.01
Metabolizable energy	15.59^ab	15.38^b	15.59^ab	15.70^a	15.55^ab	15.74^a	15.61^ab	0.009	15.56	15.68	0.09
Coefficient
DM Digestibility	88.7^c	88.2^c	88.9^c	90.1^ab	89.2^bc	90.8^a	90.2^a	0.12	89.0	90.5	0.001
E Digestibility	89.6^bc	89.1^c	89.8^bc	90.4^ab	90.1^bc	91.3^a	90.6^ab	0.14	89.8	91.0	0.001
Metabolizability	87.9^b	87.2^b	88.0^b	88.4^ab	88.0^b	89.3^a	88.4^ab	0.15	87.9	88.9	0.01
N Digestibility	83.7	83.3	84.3	84.7	84.3	84.3	84.2	0.30	84.1	84.3	0.72
N retention as percentage of
Intake⁵	38.2^a	32.1^ab	30.5^ab	35.2^ab	35.0^ab	29.6^ab	28.8^b	1.01	34.2	29.2	0.28
Absorbed⁶	45.7^a	38.5^ab	36.1^ab	41.6^ab	41.3^ab	35.0^b	34.2^b	1.14	40.3	34.6	0.20