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Year : 2015
Tome : 166
Volume : 11-12
Pages : 350-359
Title : In vitro digestibility and fermentation kinetics of five fodder shrubs leaves in northern of Algeria
Authors : L. MEBIROUK-BOUDECHICHE, S. ABIDI, M. CHERIF, I. BOUZOURAA
Summary : The chemical composition and characteristics of the in vitro fermentation were determined for 6 shrub species collected in a pastoral area of northeastern Algeria during the grazing period (spring). Primary and secondary chemical composition was determined and the fermentation parameters in vitro were measured in 100 ml glass syringes for 72 hours to determine the gas production and methane with and without the presence of polyethylene glycol (PEG) and deduce the metabolizable energy (ME). We have established correlations between the different parameters analyzed. The levels of crude protein (MAT) are the highest for Acacia mimosa (15,01% DM) which is the richest in secondary compounds (35,98 and 38,32 g tannic acid equivalent / kg DM for phenols and total tannins and 10,27 g equivalent leucocyanidin / kg DM for condensed tannins), these latter being the lowest for Lavandula stoechas (12,28 and 6,91 g tannic acid equivalent / kg DM for total phenols and tannins equivalent leucocyanidin; 1,48 g / kg DM for condensed tannins) which has shown the most digestible after 72 hours of incubation (43,40 ml / 0.2 gDM). In the absence of PEG after 24 hours of incubation, the production of gas and methane are the lowest for Acacia Mimosa (7,34 and 2,96 ml / 0,2 gDM respectively), the addition of PEG has significantly improved this production with rates of increase of 256,16% and 531,80% for gas and methane. It is not the same for Phillyrea angustifolia and Phillyrea latifolia for whom the PEG had a depressive effect on gas production and methane (-5,69; -16,58 for P. angustifolia and -3, 86 ; -38,01% for P. latifolia). It was concluded by the in vitro technique that some species available in the study area have anti methanogens important properties; it would be possible to value.
Keywords : forage shrub, chemical composition, digestibility, ruminants
Correspondence : L. MEBIROUK-BOUDECHICHE
Adress : Laboratoire d?épidémio-surveillance, santé, productions et reproduction, expérimentation et thérapie cellulaire des animaux domestiques et sauvages, Université d?El Tarf, B.P 73, 36000, EL Tarf, ALGÉRIE. boudechiche.lamia@gmail.fr
Link : pdf

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