Lipopolysaccharide immune stimulation but not β-mannanase supplementation affects maintenance energy requirements in young weaned pigs

Huntley, Nichole F.; Nyachoti, C. Martin; Patience, John F.

doi:10.1186/s40104-018-0264-y

Journal of Animal Science and Biotechnology

Table 7 Effect of treatment on energy balance, respiratory quotient, maintenance energy requirements, and nutrient deposition^c

From: Lipopolysaccharide immune stimulation but not β-mannanase supplementation affects maintenance energy requirements in young weaned pigs

	Treatment				Treatment P-value
Item	CON^d	ENZ^e	ISS^f	SEM	Treatment P-value
Day 16 BW, kg	14.37	14.19	13.77	0.26	0.313
Day 16 DMI, kg	0.51	0.51	0.46	0.03	0.348
Energy balance, kcal/kg BW^0.60/kg DMI/d
ME intake	771.3	755.9	751.1	37.7	0.924
Heat production^g
HP_total	278.8^b	274.9^b	333.0^a	14.9	0.040
FHP_total	287.8	276.0	324.3	17.1	0.178
FHP	207.8	206.6	243.3	12.9	0.135
Retained energy^h
As protein	197.5	173.6	191.0	18.3	0.627
As lipid	291.4^a	302.9^a	227.7^b	19.2	0.046
Total	488.9	476.5	418.7	32.0	0.318
k_mg, %	87.07	86.44	83.01	1.34	0.130
Estimated ME_m	239.0^b	239.5^b	295.5^a	15.3	0.045
Retained energy, % of ME intake
As protein	25.68	23.15	24.99	1.27	0.354
As lipid	37.77^a	40.07^a	29.81^b	2.02	0.013
Total	63.44^a	63.22^a	54.80^b	2.18	0.033
Respiratory quotient
Fed state	0.92	0.90	0.88	0.01	0.225
Fasting state	0.74	0.73	0.73	0.01	0.381
Nutrient depositionⁱ, g/d
As protein	87.74	78.55	69.80	5.86	0.150
As lipid	76.22^a	79.43^a	55.45^b	6.21	0.047
ADG d 10–16, g/d	447.1^a	404.8^a	330.7^b	21.3	0.010

^a,bWithin a row, treatment means without a common superscript differ, P < 0.05
^cn = 7 pigs per treatment (CON and ENZ) and 6 pigs per treatment (ISS)
^dControl treatment (CON) = pigs fed basal diet (0.0% β-mannanase) with saline injection
^eEnzyme treatment (ENZ) = pigs fed enzyme diet (0.056% β-mannanase) with saline injection
^fImmune system stimulation treatment (ISS) = pigs fed enzyme diet (0.056% β-mannanase) with LPS (Escherichia coli serotype O55:B5) injection
^gHeat production (HP) = (3.87 × O₂ consumption (L) + 1.20 × CO₂ production (L) – 1.43 × urinary N)/BW^0.60 (kg) [22]; Total HP (HP_total) = avg. HP over 22 h fed state, post- challenge; Total fasting HP (FHP_total) = avg. HP over 12 h fasted state; Fasting HP (FHP) = avg. of 10 lowest HP values over the 12 h fasted state [27, 28]; HP₁₀ = avg. HP over 10 h post-challenge (10:00 h – 20:00 h), fed state; HP_low = avg. of 10 lowest HP values over 10 h post-challenge (10:00 h – 20:00 h), fed state; Activity HP (AHP) = HP₁₀ - HP_low; Thermic effect of feeding (TEF) = HP₁₀ - AHP – FHP; Heat increment (HI) = AHP + TEF; ME efficiency for maintenance and growth (k_mg) = (1 – HI) × 100 [25]; ME used for maintenance (ME_m) = FHP × 100/k_mg [25]
^hRetained energy (RE) = ME intake – total fed-state HP, pre-and post-challenge [29]; RE as protein (RE_p) = [PD (g) × 5.66 (kcal/g)]/ BW^0.60/DMI [30]; RE as lipid (RE_l) = RE - RE_p [30]
ⁱProtein deposition = nitrogen retention (g) × 6.25; Lipid deposition = RE_f (kcal) / 9.49 (kcal/g) [30]

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ISSN: 2049-1891

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