20.500.12556/RUL-179995 Effect of water level and tannin inclusion on in vitro degradability and digestibility of soybean meal Optimizing dietary protein utilization is essential for improving ruminant nutrition, and tannins can reduce the ruminal degradability of soybean meal (SBM) proteins through tannin–protein complex formation, a process enhanced by water. This study evaluated three water levels (1:0.625, 1:1.25, 1:2.5 w/v) combined with chestnut or quebracho tannins at 50 and 100 g/kg on in vitro dry matter (DM) and crude protein (CP) degradability and digestibility of SBM. Increasing water levels significantly reduced crude protein degradability (p < 0.05), with the greatest decline observed for chestnut tannins at 100 g/kg, decreasing from 640 g/kg at the lowest water level to 423 g/kg at the highest. Post-ruminal crude protein digestibility increased slightly with water for this treatment (from 977 to 984 g/kg). Bypass protein content ranged from 138 g/kg (quebracho 100 g/kg, low water) to 563 g/kg (chestnut 100 g/kg, high water), with increases of 20.7% and 22.6% for chestnut tannins at 50 and 100 g/kg, respectively. Bypass protein digestibility improved by up to 4.4%. Dry-matter degradability decreased by 6.8% to 23.5% depending on treatment. These findings demonstrate that water greatly enhances tannin efficacy and highlight its potential for improving protein utilization. in vitro bypass protein soybean meal tannins ruminant prežvekovalci prehrana živali krma soja beljakovine tanini voda in vitro prebavljivost in vitro razgradljivost true false true Angleški jezik Angleški jezik Članek v reviji 2026-02-27 12:54:40 2026-02-27 12:54:45 2026-03-02 14:05:37 0000-00-00 00:00:00 2026 0 0 14 str. issue 5, [article no.] 718 Vol. 16 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2026-02-25 636.085/.087 2076-2615 10.3390/ani16050718 269933827 RAZ_Valcl_Nejc_2026.pdf RAZ_Valcl_Nejc_2026.pdf 1 6336289F156103B2129D8C2BA4CAF44F 38d8f1034b59710110c29055a4c2f85906d1642d4ce7eada2077d1032f5bb7d0 cef6fd5d-13d2-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228988 Biotehniška fakulteta 0 0 0