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Fig. 2 | Journal of Animal Science and Biotechnology

Fig. 2

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

Fig. 2

Relationship between heat production and metabolizable energy (ME) intake. HP0 = Extrapolated total heat production at zero energy intake. FHP 1 corresponds to the FHP measured with animals receiving the highest feed level and FHP2 corresponds to the FHP measured with animals receiving the lowest feed level. The slope of line B = HI:ME. The complement of the slope of line B is kg (NE:ME). The slope of line A = (HIi:ME). The complement of the slope of line A is km (NEm: ME), km > kg (adapted from Labussière et al. [23]; Noblet and van Milgen, [20]). FHP: Fasting heat production; HI: Heat increment; km: Efficiencies of energy utilization for maintenance; kg: Efficiencies of energy utilization for growth; MEm: Metabolizable energy requirements for maintenance; NE: Net energy; NEm: Net energy requirements for maintenance

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