Recently, a variety of studies have focused on the evaluation
of the effects of dietary utilization on environmental
stressors such as aerial NH3 and H2S, which are regarded
as the principal components of pig manure, and have been
shown to contribute to environmental pollution (Zahn et al.,
1997). It is previously suggested that the addition of organic
acids might serve to reduce noxious gas emissions in growing
and finishing pigs. Recent study conducted by Chen et al.
(2010) have suggested that bamboo vinegar could induce a
reduction in total Kjeldahl nitrogen (TKN) losses occurring
during the composting of porcine manure; they also reported
that a better effect could be achieved via the addition of BV in
the control of TKN losses during composting as compared to
a mere increase in bamboo charcoal (Asada et al., 2006).
Therefore, it should be postulated that the effects noted
in the current study may be attributable to the following
factors: 1) The improved nutrient digestibility induced by
bamboo vinegar may reduce the environmental levels of
noxious gases by ameliorating nitrogen losses; 2) the positive
effects on intestinal microbes and intestine health, and
the subsequent reduction in microbial fermentation in the
large intestine.