Ruminal bacteria and protozoa provide excellent organic phosphorus (P) sources for the host animal. This experiment was conducted to compare the bioavailability of bacterial and protozoal P in comparison with that of dicalcium phosphate (DCP) as a reference phosphorus source. Bacteria and protozoa were isolated from the rumen contents of dairy cows and the chick-model was used to determine the ...

Sixteen zebu-cross steers, kept under grazing conditions, were supplemented with increasing levels of concentrate (0.4, 0.7 and 1.0% of body weight) over three periods of 41, 41 and 42 days, respectively. The animals were divided into four groups, a control plus groups supplemented with either monensin, yeast culture or a combination of monensin and yeast culture. Samples of rumen contents were...

A wide range of plant bioactive components (phytochemicals) have been identified as having potential to modulate the processes of fermentation in the rumen. The use of plants or plant extracts as natural feed additives has become a subject of interest not only among nutritionists but also other scientists. Although a large number of phytochemicals (e.g. saponins, tannins and essential oils) hav...

An experiment was conducted to study the effect of presence or absence of rumen ciliate protozoa on nutrient intake, its utilization, rate of body weight gain and feed conversion ef®ciency of lambs in post-weaning phase of growth. Forty ®ve weaned Malpura lambs, divided into three equal groups (G1, G2 and G3) were either defaunated by periodic dosing of sodium lauryl sulfate at the rate of 8 g/...

The objective of this study was to investigate microbial population in the rumen of dairy steers as influenced by supplementing with dietary condensed tannins and saponins and different roughage to concentrate ratios. Four, rumen fistulated dairy steers (Bos indicus) were used in a 2×2 factorial arrangement in a 4×4 Latin square design. The main factors were two roughage to concentrate ratios (...

This study presents the results of an experiment in which the effect of addition of a yeast culture (Saccharomyces cerevisiae, Strain 47) on rumen fermentation was studied in thirty-six dairy cows of Holstein breed. The animals were divided into one control and five experimental groups. Each group involved 6 individuals. The animals received a diet consisting of good maize silage with a higher ...