Reference : Effects Of The Nature Of Nitrogen Supplementation On Voluntary Intake, Rumen Paramete...
Scientific journals : Article
Life sciences : Animal production & animal husbandry
Life sciences : Agriculture & agronomy
Effects Of The Nature Of Nitrogen Supplementation On Voluntary Intake, Rumen Parameters And Ruminal Degradation Of Dry Matter In Sheep Fed Oat Silage-Based Diets
Mahouachi, Mokhtar [Ecole Supérieure d'Agriculture de Kef, Tunisie > > Laboratoire de Production Animale > >]
Haddad, L. [Institut National Agronomique de Tunisie > > Laboratoire de Nutrition Animale > >]
Kayouli, Chedly [Institut National Agronomique de Tunisie > > Laboratoire de Nutrition Animale > >]
Thewis, André mailto [Université de Liège - ULiège > > Gembloux Agro-Bio Tech >]
Beckers, Yves mailto [Université de Liège - ULiège > > Gembloux Agro-Bio Tech >]
Small Ruminant Research
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[en] Oat silage ; Nitrogen supplementation ; Intake ; ruminal degradation ; Poultry litter ; Urea ; Soybean meal
[fr] Ensilage d'avoine ; Supplémentation azotée ; Ingestion ; Dégradation ruminale ; Litière volailles ; Urée ; Tourteau de soja
[en] The effects of nature of nitrogen supplementation on silageDMintake (SDMI), totalDMintake (TDMI), rumen parameters and ruminal degradation of DM of silage and wheat straw were studied using four adult Noire de Thibar rams. Silage was made from predominantly oats harvested at milk stage and ensiled without preservative. The silage was offered ad libitum as the sole diet (OS) or supplemented with 450 g DM of iso-nitrogen (25.6 g/kg DM) and iso-energy (0.8 Unité Fourragère Lait: UFL/kg DM) concentrate containing soybean meal (SBM), urea (UR) or poultry litter (PL) as nitrogen supplements. SDMI (g/kgW0.75 × day) and TDMI (g/kgW0.75 × day) were affected (P < 0.001) by the type of supplement and averaged 63.9, 60.1, 54.9, 51.1 and 63.9, 81.4, 74.8, 72.2 for OS, SBM, PL and UR diets, respectively. In comparison with other diets, SBM diet systematically decreased (P < 0.05) the pH of the rumen after the morning feeding and reduced the rumen concentration of total VFA at 1 h after feeding. SBM diet decreased DM disappearance of the oat silage incubated in nylon bags for 72 h (P < 0.05), but not of wheat straw. The three supplements increased the ammonia-N concentrations in the rumen for several hours after feeding in comparison with the OS diet. However, only the SBM diet kept this difference just before the next meal. It is concluded that despite its low nutritive value (0.62 UFL and 108 g crude protein/kg DM), the oat silage is well consumed by the local ruminants accustomed to use poor forages for a long time. In Tunisia, poultry litter may be used as a nitrogen source to supplement the oat silage for sheep.
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