Methodologies on estimating the energy requirements for maintenance and determining the net energy contents of feed ingredients in swine: a review of recent work

Table 1 Information on intake and output for pigs^a

Diets	n	Mean BW, kg	Intake		Output								Gas exchange, L/d			Digestibility, %
			Feed, kg/d	GE, MJ/d	Feces		Urine		CH₄ energy, MJ/d	HP, MJ/d			O₂	CH₄	CO₂	DM	GE
			Feed, kg/d	GE, MJ/d	Weight, g/d	GE, MJ/d	Volume, L/d	GE, MJ/d	CH₄ energy, MJ/d	THP	FHP	HI	O₂	CH₄	CO₂	DM	GE
Corn-soybean meal	30	45.53	1.46	24.31	380.4	2.57	2.64	0.57	0.19	12.73	7.66	5.07	606.4	4.9	660.8	73.9	89.4
Oil-seed meals^b	66	44.78	1.45	24.51	576.6	3.80	3.19	0.81	0.14	12.26	7.50	4.76	587.8	3.6	619.6	60.2	84.5
Fibrous ingredients^c	24	44.70	1.54	24.62	766.6	4.47	2.33	0.74	0.16	12.04	7.22	4.82	593.8	4.1	634.1	50.2	81.8
Corn DDGS	36	47.08	1.68	28.09	622.1	4.09	3.08	1.02	0.26	13.69	7.78	5.91	651.7	6.6	735.5	63.0	85.4
Mean^d	168	45.07	1.50	25.22	558.2	3.62	2.89	0.78	0.18	12.61	7.53	5.08	604.8	4.5	654.9	62.8	85.6

^aData from NE trials conducted at MAFIC; pigs were fed in crates with a feed intake lower than ad libitum; GE, gross energy; HP, heat production; THP, total heat production; FHP, fasting heat production; HI, heat increment
^bIncludes rapeseed meal, peanut meal, sunflower meal, and cottonseed meal
^cIncludes rice bran, corn germ meal, corn gluten feed, and wheat bran
^dExcluding corn-SBM, oil-seed meals, high-fiber meals, and corn DDGS but including wheat and corn diets

ISSN: 2049-1891