Influência de extratos fitogênicos in vitro na produção de massa microbiana do rúmen

Abstract

The additives are phytogenic chemical compounds present in plant extracts and has been attracting interest in its pharmacological actions as a contribution of rumen fermentation, possibly increasing microbial mass and consequently improving the digestibility of forage. Some plants in the Northeast are widely used and considered effective in animals, including the (Typha domingensis) and silk flower (Calotropis procera). The objective of this research was to observe changes in the production of microbial mass in the rumen, on in vitro procedure, thus quantifying the activity of the extract of dried reeds and silk flower in the behavior of these microorganisms and the effects in the rumen of goats. The experiment was conducted at the Laboratory of Animal Nutrition in Health Center and Rural Technology (CSTR), Federal University of Campina Grande (UFCG). The collection of plants was held in the city of Patos - PB, near the CSTR. Those, an alcohol extraction and the extract, freeze-dried to prepare the extract powder. It was developed in vitro degradation of elephant grass, with or without addition of freeze-dried extract of each plant. The rumen fluid was evaluated for color, texture, odor, pH, reduction of methylene blue (REDOX), sedimentation and about the infusoria (quantity, motility, size), besides the production of microbial mass. There was no statistical difference between the evaluation parameters of rumen fluid or in the production of microbial mass. The elephant grass had greater degradation in the treatments without addition of extracts. The addition of phytogenetic extracts (cattail and silk flower) did not alter the production of microbial mass, would not justify the use of them to enhance the activity of microorganisms.