
Miguel Angel Galina
National Autonomus University of Mexico, MexicoTitle: Use of lactic probiotics in ruminant supplementation
Abstract
This study reviews
the development and use of fermentation promoters and probiotics on the
profile of fatty acids, amino acids and cholesterol of milk from grazing
cows. A herd of 35 cows (511 ± 12 kg), which were in the middle of
lactation, Zebu crossings, over a silvopastoral system with star grass
(Cynodon plectostachyus) and brachiaria (Brachiaria brizantha),
and browsing legumes, with 3 kg of fermented promoters (FP), were
provided with 1.5 kg of lactobacilli per day as supplement (LAB). The
grazing area was 20.9 ha. Another herd of 28 animals (514 ±14 kg), grazing
on 18.5 ha, supplemented with 6 kg/d of a commercial concentrate with 160
g of commercial probioric (CP), was used. An amount of 8 commercial milks
were sampled.
The milk from the
three treatments was weighed each week. The average of production was 17
kg for LAB, of 14 kg/d in silvopastoril system (SP) and 16 kg in CP
(P<0.05). The saturated fatty acids and unsaturated fatty acids showed
differences in the three treatments (P<0.05). Polyunsaturated fatty
acids, omega 3 and conjugated linoleic acid were 34%, 46% and 68% higher
in
CP, silvopastoral
system and LAB compared to commercial milk (CM). Results have demonstrated
that grazing diverse green fresh forages improve milk quality due to the
increase of unsaturated
fatty acids. The
LAB allowed a decrease of biohydrogenation. LAB and SP provided the milks
with highest amount of omega 3.
Biography
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