Physicochemical Characteristics, in Vitro Fermentation Indicators, Gas Production Kinetics, and Degradability of Solid Herbal Waste as Alternative Feed Source for Ruminants
Abstract: The aims of this
research were to study the nutrient and secondary metabolite contents of solid
herbal wastes (SHW) that were preserved by freeze drying, sun drying and
silage, as well as to analyze their effects on in vitro fermentation indicators
i.e., gas production kinetics and degradability of solid herbal waste. Physical
and chemical properties on three forms of SHW (sun dry, freeze dry, and silage)
were characterized and then an in vitro gas production experiment was performed
to determine the kinetics of gas production, methane production, NH3, microbial
protein, and SHW degradability. Polyethylene glycol (PEG) was added to the
three treatments to determine the biological activity of tannins. Results
showed that all three preparations of SHW still contained high nutrient and
plant secondary metabolite contents. Gas production, methane, NH3, microbial
protein, in vitro degradability of dry matter (IVDMD) and organic matter
(IVDOM) of SHW silage were lower (P<0.05) compared to sun dry and freeze dry.
These results were apparently due to the high content of secondary metabolites
especially tannin. It can be concluded that solid herbal wastes (SHW) can be
used as an alternative feed ingredients for ruminants with attention to the
content of secondary metabolites that can affect the process of fermentation
and digestibility in the rumen.
Keywords: solid herbal waste;
plant secondary metabolites; antimicrobial effect; in vitro rumen fermentation
Author: A. N. Kisworo, A. Agus
Kustantinah, B. Suwignyo
Journal Code: jppeternakangg170052
