Evaluation of Yeast Culture Supplementation on Milk Yield  and Rumen Fermentation in Dairy Cows - A Field Study in  Chhattisgarh

Low milk yield remains a significant challenge for smallholder dairy farmers in Chhattisgarh, India, due to suboptimal nutrition and  inefficient rumen fermentation. This study evaluated the effects of dietary supplementation with Saccharomyces cerevisiae yeast culture  on milk production and rumen fermentation characteristics in lactating crossbred cows (30-60 DIM) under field conditions in Dhamtari  and Raipur districts. A total of 40 cows were randomly allocated into two groups: Control (basal diet only) and Treatment (basal diet plus  10 g/day of yeast culture) over a 90-day period. Results showed a statistically significant improvement (p<0.01) in average daily milk  yield in the yeast-supplemented group compared to the control (13.2±0.8 Vs. 11.1 ± 0.7 L/day), though the milk composition did not  vary significantly. Additionally, rumen pH was better stabilized, total volatile fatty acids (TVFA) production was higher, and ammonia-N  concentration was reduced in the treatment group, indicating improved rumen fermentation efficiency. These findings suggest that  yeast culture supplementation is an effective and low-cost strategy for improving dairy productivity and rumen health in smallholder  systems prevalent in tropical regions.