Table 4.

Effect of diet characteristics on energy and nitrogen balances of growing pigs (Exp. 1)¹

Item	Corn	SBM	EP-RSM	SE-RSM	SEM	P - value
BW, kg	40.2b	44.0a	44.1a	44.1a	0.9	0.01
DM intake, kg/d	1.33	1.34	1.37	1.40	0.02	0.07
Digestibility coefficients, %
DM	90.4a	90.0a	87.3b	85.8b	0.7	<0.01
CP	79.9b	88.0a	86.2a	85.1a	1.3	<0.01
OM	90.4a	90.2a	87.7b	86.3b	0.7	<0.01
GE	88.2a	88.3a	86.2ab	84.0b	0.8	<0.01
Nitrogen balance, g/d
Intake	19.9d	37.0c	46.9b	50.4a	0.6	<0.01
Fecal output	4.0b	4.5b	6.6a	7.5a	0.5	<0.01
Urinary output	6.6b	10.6ab	15.5a	15.4a	1.4	<0.01
Retention	9.4b	21.9a	24.8a	27.5a	1.2	<0.01
Energy utilization, %
Urinary energy % of DE	1.8c	2.7b	3.4ab	3.9a	0.25	<0.01
Methane energy, % DE	0.4	0.7	0.4	0.6	0.08	0.06
ME/DE	97.8a	96.6b	96.2bc	95.5c	0.27	<0.01
NE/ME	78.2	76.5	76.3	76.7	0.82	0.16
Energy balance, kJ/(kg BW0.6·d)
ME intake,	2,273a	2,160bc	2,195b	2,120c	28	<0.01
THP	1,259	1,308	1,268	1,250	25	0.15
THPc2	1,232	1,317	1,265	1,271	22	0.08
REP 3	152c	337b	381ab	424a	20	<0.01
REL 4	862a	516b	546b	446b	34	<0.01
RE	1,014a	852b	928b	870b	27	<0.01
FHP	769	809	756	766	22	0.18
RQ
Fed state	1.11a	1.05b	1.02b	1.03b	0.01	<0.01
Fasted state	0.77	0.77	0.78	0.78	0.01	0.07
Energy values, MJ/kg DM
DE	15.98a	16.10a	16.14a	15.42b	0.14	<0.01
ME	15.64a	15.56a	15.52a	14.73b	0.13	<0.01
NE	12.23a	11.90a	11.84ab	11.30b	0.15	<0.01

¹A total 24 pigs were allotted to 1 of 4 dietary treatments with six pigs per diet and four periods, 16 d per period; SBM, soybean meal; EP-RSM, expelled press rapeseed meal; SE-RSM, solvent extracted rapeseed meal

²THPc means that total heat production was adjusted for comparable ME intake by covariance

³RE_P = Energy retention as protein [kJ/(kg BW^0.6·d)] = [N intake (g) – N in feces (g) – N in urine (g)] × 6.25 × 23.86 (kJ/g)/BW^0.6

⁴ RE_L = Energy retention as fat [kJ/kg BW^0.6·d)]  = [RE (kJ) – energy retention as protein (kJ)]/BW^0.6

^abcdMeans in the same row with differing superscripts differ (P < 0.05)