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The effects of Propionibacterium acidipropionici and Lactobacillus plantarum, applied at ensiling, on the fermentation and aerobic stability of low dry matter corn and sorghum silages

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Journal of Industrial Microbiology and Biotechnology

Abstract

The aim of this work was to study the effects of applying a strain of Propionibacterium acidipropionici, with or without Lactobacillus plantarum, on the fermentation and aerobic stability characteristics of low dry matter (DM) corn (Zea mays L.) and sorghum (Sorghum bicolor L.) silages. Corn at the dent stage and sorghum at the flowering stage were harvested. Treatments comprised control (no additives), P. acidipropionici, L. plantarum and a combination of P. acidipropionici and L. plantarum. Fresh forages were sampled prior to ensiling. Bacterial inoculants were applied to the fresh forage at 1.0×106 colony-forming units per gram. After treatment, the chopped fresh materials were ensiled in 1.5-l anaerobic glass jars equipped with a lid that enabled gas release only. Three jars per treatment were sampled on days 2, 4, 8, 16 and 60 after ensiling, for chemical and microbiological analysis. At the end of the ensiling period, 60 days, the silages were subjected to an aerobic stability test. The L. plantarum inoculated silages had significantly higher levels of lactic acid than the controls, P. acidipropionici and combination of P. acidipropionici and L. plantarum inoculated silages (P<0.05). The P. acidipropionici did not increase propionic and acetic acid levels of the silages. After the aerobic exposure test, the L. plantarum and combination of P. acidipropionici and L. plantarum had produced more CO2 than the controls and the silages inoculated with P. acidipropionici (P<0.05). All silages had high levels of CO2 and high numbers of yeasts and molds in the experiment. Therefore, all silages were deteriorated under aerobic conditions. The P. acidipropionici and combination of P. acidipropionici and L. plantarum were not able to improve the aerobic stability of fast-fermenting silages, because they could not work well in this acidic environment. The results showed that P. acidipropionici and combination of P. acidipropionici and L. plantarum did not improve the aerobic stability of low DM corn and sorghum silages, which are prone to aerobic deterioration.

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Acknowledgements

This work was supported by the Uludag University, Bursa, Turkey, Project No. 2002/20.

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  1. Animal Science Department, Faculty of Agriculture, Uludag University, 16059, Bursa, Turkey

    I Filya, E Sucu & A Karabulut

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  1. I Filya
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  2. E Sucu
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  3. A Karabulut
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Correspondence to I Filya.

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Filya, I., Sucu, E. & Karabulut, A. The effects of Propionibacterium acidipropionici and Lactobacillus plantarum, applied at ensiling, on the fermentation and aerobic stability of low dry matter corn and sorghum silages. J IND MICROBIOL BIOTECHNOL 33, 353–358 (2006). https://doi.org/10.1007/s10295-005-0074-z

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  • DOI: https://doi.org/10.1007/s10295-005-0074-z

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