Effects of a Bacterial Hay Preservative (Pediococcus pentosaceus) on Hay under Experimental Storage Conditions.

Applied and Environmental Microbiology
C DuchaineY Cormier

Abstract

The abundant growth of molds and thermophilic actinomycetes in stored hay decreases its quality and can be hazardous for the producer who inhales these contaminants when the moldy hay is fed in closed barns. These microbes are responsible for a respiratory disease called farmer's lung. Products, including bacterial cultures that can be inoculated in hay, are available to prevent hay deterioration by molds and bacteria. The aim of this study was to verify the effectiveness of Pediococcus pentosaceus (a bacterial inoculant) in preventing hay deterioration at different humidity levels in a laboratory experiment. Mixtures of grasses (mostly alfalfa, timothy, and clover) placed in plastic bags were treated with the commercially available product (live culture of P. pentosaceus) at 500,000 and 5,000,000 CFU/g of hay and humidified at different levels (20, 25, 30, and 35%). Control batches of hay (untreated) were prepared at the same humidity levels. The growth of inoculated bacteria in hay, pH level, and hay deterioration were evaluated. Under these experimental conditions, the growth of P. pentosaceus was abundant only when it was inoculated in very moist hay (35% moisture), resulting in bacterium levels of 6.3 x 10(sup8) CFU/g afte...Continue Reading

References

Sep 1, 1995·American Journal of Respiratory and Critical Care Medicine·S BouchardY Cormier

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Citations

Oct 18, 2011·Journal of the Science of Food and Agriculture·Virginie SéguinAlain Ourry

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