Av Pernilla Folkesson - SLU.SE

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Martín, 1991). The pHnear neutral of the SAC stomach neutralizes the VFA, which are then kept as ions and moreslowly absorbed (López et al., 1998). The saccules of C-1 and C-2 also contribute in bufferingthe stomach pH during feeding (Eckerlin and Stevens, 1973).The VFA concentration in the stomach of alpacas increases during feeding, with its peakconcentration 30 minutes after finished feeding (Vallenas and Stevens, 1970). The effectiveabsorption system in the stomach of camelids is probably the reason why the drop in pH isless significant in these species (Hintz et al., 1973). Whithin 5 to 6 hours after feeding VFAconcentration in the fermentation chambers returns to preprandial levels(Vallenas and Stevens, 1970).In a feeding trial, where the diet was composed by 0.9 kg of concentrate and ad libitum alfalfahay, the pH of the digesta dropped after concentrate intake with its lowest value 2.5 hoursafter finishing feeding. Whithin 6 to 7 hours the pH was returned to the same level as beforeconcentrate intake. Low ingesta pH was correlated to high total VFA concentration(Vallenas and Stevens, 1970).VFA absorbation from the proximal four-fifths of C-3 is similar to the absorbation from C-1and C-2 (Fowler, 1998c). Caudal to the stomach, llamas and alpacas have a lowerconcentration of VFA when compared to sheep,

Camelids are considerer pseudo-ruminants, as opposed to the true ruminants in the Ruminatia suborder (Van Saun, 2006). Problems with defining and homologizing the compartments of the stomach in camelids with true ruminants have also arisen (Vallenas et al., 1971). Camelid species

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