Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec)
The objective of the present study was to investigate the effects of three different hydrolysed yeast products derived from Saccharomyces cerevisiae [hydrolysed whole yeast (HWY), less hydrolysed whole yeast (LHWY), and yeast cell wall (YCW)] on microbial fermentation characteristics using the rumen...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2016-04-01
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| Series: | Veterinární Medicína |
| Subjects: | |
| Online Access: | https://vetmed.agriculturejournals.cz/artkey/vet-201604-0003_effects-of-hydrolysed-yeasts-on-ruminal-fermentation-in-the-rumen-simulation-technique-rusitec.php |
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| author | H. Oeztuerk B. Emre G. Breves |
| author_facet | H. Oeztuerk B. Emre G. Breves |
| author_sort | H. Oeztuerk |
| collection | DOAJ |
| description | The objective of the present study was to investigate the effects of three different hydrolysed yeast products derived from Saccharomyces cerevisiae [hydrolysed whole yeast (HWY), less hydrolysed whole yeast (LHWY), and yeast cell wall (YCW)] on microbial fermentation characteristics using the rumen simulation technique (Rusitec) with three consecutive experiments. The Rusitec system consisted of six fermentation vessels. Each vessel received 5 g chopped meadow hay and 4 g concentrate (as-fed basis) daily for up to 22 days. Yeast products were added to the fermentation vessels at a concentration of 0.25 or 0.75 g/day. In most cases, ruminal microbial activity was stimulated by HWY and YCW, particularly at the 0.75 g/day level. HWY resulted in a decrease (P < 0.05) in ruminal pH and an increase (P < 0.05) in total short-chain fatty acid (SCFA), acetate, propionate and methane productions, and an increase in NH3-N concentration when compared with the control values. Ruminal pH was not altered, but total SCFA, acetate, propionate, butyrate, and methane productions as well as NH3-N concentration increased (P < 0.05) in response to YCW treatment. Digestibility of organic matter was not significantly affected by either HWY or YCW. The effects of LHWY on ruminal fermentation characteristics were negligible. These results indicate that degree of hydrolysation (low or high) and composition of yeasts (whole cell or cell wall) have remarkable effects on ruminal microbial activity in the Rusitec system. |
| first_indexed | 2024-04-10T08:00:07Z |
| format | Article |
| id | doaj.art-db4c9bd6fdb345dba7a038ac5df64faf |
| institution | Directory Open Access Journal |
| issn | 0375-8427 1805-9392 |
| language | English |
| last_indexed | 2024-04-10T08:00:07Z |
| publishDate | 2016-04-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Veterinární Medicína |
| spelling | doaj.art-db4c9bd6fdb345dba7a038ac5df64faf2023-02-23T03:50:32ZengCzech Academy of Agricultural SciencesVeterinární Medicína0375-84271805-93922016-04-0161419520310.17221/8820-VETMEDvet-201604-0003Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec)H. Oeztuerk0B. Emre1G. Breves2Faculty of Veterinary Medicine, Ankara University, Ankara, TurkeyFaculty of Veterinary Medicine, Ankara University, Ankara, TurkeyInstitute for Physiology, University of Veterinary Medicine Hannover, Hannover, GermanyThe objective of the present study was to investigate the effects of three different hydrolysed yeast products derived from Saccharomyces cerevisiae [hydrolysed whole yeast (HWY), less hydrolysed whole yeast (LHWY), and yeast cell wall (YCW)] on microbial fermentation characteristics using the rumen simulation technique (Rusitec) with three consecutive experiments. The Rusitec system consisted of six fermentation vessels. Each vessel received 5 g chopped meadow hay and 4 g concentrate (as-fed basis) daily for up to 22 days. Yeast products were added to the fermentation vessels at a concentration of 0.25 or 0.75 g/day. In most cases, ruminal microbial activity was stimulated by HWY and YCW, particularly at the 0.75 g/day level. HWY resulted in a decrease (P < 0.05) in ruminal pH and an increase (P < 0.05) in total short-chain fatty acid (SCFA), acetate, propionate and methane productions, and an increase in NH3-N concentration when compared with the control values. Ruminal pH was not altered, but total SCFA, acetate, propionate, butyrate, and methane productions as well as NH3-N concentration increased (P < 0.05) in response to YCW treatment. Digestibility of organic matter was not significantly affected by either HWY or YCW. The effects of LHWY on ruminal fermentation characteristics were negligible. These results indicate that degree of hydrolysation (low or high) and composition of yeasts (whole cell or cell wall) have remarkable effects on ruminal microbial activity in the Rusitec system.https://vetmed.agriculturejournals.cz/artkey/vet-201604-0003_effects-of-hydrolysed-yeasts-on-ruminal-fermentation-in-the-rumen-simulation-technique-rusitec.phphydrolysed yeastfermentation, rumensaccharomyces cerevisiae |
| spellingShingle | H. Oeztuerk B. Emre G. Breves Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) Veterinární Medicína hydrolysed yeast fermentation, rumen saccharomyces cerevisiae |
| title | Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) |
| title_full | Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) |
| title_fullStr | Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) |
| title_full_unstemmed | Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) |
| title_short | Effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique (Rusitec) |
| title_sort | effects of hydrolysed yeasts on ruminal fermentation in the rumen simulation technique rusitec |
| topic | hydrolysed yeast fermentation, rumen saccharomyces cerevisiae |
| url | https://vetmed.agriculturejournals.cz/artkey/vet-201604-0003_effects-of-hydrolysed-yeasts-on-ruminal-fermentation-in-the-rumen-simulation-technique-rusitec.php |
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