Influence of inoculated maize silage and sunflower oil on the in vitro fermentation, ciliate population and fatty acid outputs in the rumen fluid collected from sheep
2010
Varadyova, Z.,Slovenska Akademia Vied, Kosice (Slovak Republic). Ustav Fyziologie Hospodarskych Zvierat | Kisidayova, S.,Slovenska Akademia Vied, Kosice (Slovak Republic). Ustav Fyziologie Hospodarskych Zvierat | Laukova, A.,Slovenska Akademia Vied, Kosice (Slovak Republic). Ustav Fyziologie Hospodarskych Zvierat | Jalc, D.,Slovenska Akademia Vied, Kosice (Slovak Republic). Ustav Fyziologie Hospodarskych Zvierat
The effect of maize silage (MS) supplemented with sunflower oil (SO) on the rumen fermentation parameters, growth of ciliate population and fatty acid outputs was investigated for 72 hours using a batch culture fermentation technique. The rumen fluid from ruminally fistulated sheep was mixed with McDougall's buffer (1:1) and added (35 mL) to fermentation bottles containing 1.5 g (0.38 g of DM) of MS with or without SO (30 g/kg of DM). Four types of MS were used: uninoculated (MS) or inoculated with Lactobacillus plantarum CCM 4000 (MS+LP), Lactobacillus fermentum LF2 (MS+LF) or Enterococcus faecium CCM 4231 (MS+EF) in simultaneous incubations at 39+/-0.5 deg C for 72 h in vitro. Total gas production was decreased by SO (by 16-17%) in MS and all inoculated MS. Methane production was not significantly influenced by SO. The concentration of total volatile fatty acids, molar proportions of acetate, propionate and n-butyrate were significantly influenced by SO. The number of Dasytricha ruminantium was significantly higher in MS+LP than in MS. Outputs of trans vaccenic acid (TVA), linoleic acid, conjugated linoleic acid (CLA) and alpha-linolenic acid were significantly influenced by SO. However, the output of CLA was significantly increased only in MS+LF. It can be concluded that the supplementation of sunflower oil into maize silage is not effective as dietary antiprotozoal agents in a short-time interval, but it might positively affect the rumen bacterial population and activities. Sunflower oil with inoculated and uninoculated maize silage could be effective for an increase of TVA in the rumen fluid of sheep.
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