Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants
Abstract Soybean meal is a widely used protein source for ruminants, but its high ruminal degradability can limit its nutritional value. Tannins reduce ruminal crude protein degradability by forming tannin-protein complexes, which are facilitated by water addition and heat during drying. The study e...
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Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-14678-6 |
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| author | Nejc Valcl Andrej Lavrenčič |
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| description | Abstract Soybean meal is a widely used protein source for ruminants, but its high ruminal degradability can limit its nutritional value. Tannins reduce ruminal crude protein degradability by forming tannin-protein complexes, which are facilitated by water addition and heat during drying. The study evaluated the effects of drying methods (freeze-dried, 50 °C, 80 °C) combined with two tannin types (chestnut and quebracho) at two concentrations (50 and 100 g/kg) on the in vitro degradability and digestibility of soybean meal dry matter and crude protein. Tannins combined with drying methods effectively reduced ruminal degradation of soybean meal protein. The drying at 80 °C combined with chestnut or quebracho tannins at both concentrations (except 100 g/kg chestnut tannins) showed the largest reduction in ruminal crude protein degradability without negatively affecting post-ruminal digestibility. The most effective combination for reducing crude protein (-42.3%) degradability compared to the control was 50 g/kg chestnut tannins with drying at 80 °C without affecting in vitro dry matter and crude protein digestibility. This combination also increased by-pass protein content (431 g/kg DM) and improved its digestibility by 21%. |
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| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
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| spelling | doaj-art-73b3a53ff44547cf8b903fc35264be722025-08-20T03:46:04ZengNature PortfolioScientific Reports2045-23222025-08-011511910.1038/s41598-025-14678-6Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminantsNejc Valcl0Andrej Lavrenčič1Biotechnical Faculty, Dept. of Animal Science, University of LjubljanaBiotechnical Faculty, Dept. of Animal Science, University of LjubljanaAbstract Soybean meal is a widely used protein source for ruminants, but its high ruminal degradability can limit its nutritional value. Tannins reduce ruminal crude protein degradability by forming tannin-protein complexes, which are facilitated by water addition and heat during drying. The study evaluated the effects of drying methods (freeze-dried, 50 °C, 80 °C) combined with two tannin types (chestnut and quebracho) at two concentrations (50 and 100 g/kg) on the in vitro degradability and digestibility of soybean meal dry matter and crude protein. Tannins combined with drying methods effectively reduced ruminal degradation of soybean meal protein. The drying at 80 °C combined with chestnut or quebracho tannins at both concentrations (except 100 g/kg chestnut tannins) showed the largest reduction in ruminal crude protein degradability without negatively affecting post-ruminal digestibility. The most effective combination for reducing crude protein (-42.3%) degradability compared to the control was 50 g/kg chestnut tannins with drying at 80 °C without affecting in vitro dry matter and crude protein digestibility. This combination also increased by-pass protein content (431 g/kg DM) and improved its digestibility by 21%.https://doi.org/10.1038/s41598-025-14678-6In vitro degradabilityIn vitro digestibilityProteinRuminantsTannins |
| spellingShingle | Nejc Valcl Andrej Lavrenčič Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants Scientific Reports In vitro degradability In vitro digestibility Protein Ruminants Tannins |
| title | Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| title_full | Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| title_fullStr | Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| title_full_unstemmed | Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| title_short | Effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| title_sort | effect of tannins and drying methods on in vitro dry matter and crude protein degradability and digestibility of soybean meal for ruminants |
| topic | In vitro degradability In vitro digestibility Protein Ruminants Tannins |
| url | https://doi.org/10.1038/s41598-025-14678-6 |
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