<![CDATA[This study aimed to investigate the protective effect of condensed tannins (CT) derived from *Albizia falcataria* leaf extract on soybean meal (SBM) regarding Rumen Degradable Protein (RDP), Rumen Undegradable Protein (RUP), and Crude Protein Degradation (CPD) values. The study employed a Completely Randomized Design (CRD) with four treatments, six replicates, and two experimental units. The treatments were: P0 = no protection, P1 = 2% condensed tannins, P2 = 4% condensed tannins, and P3 = 6% condensed tannins. Protein degradation was evaluated using the ANKOM Daisy Incubator method, with RDP, RUP, and CPD values as the observed parameters. The results showed that protecting SBM with CT from *Albizia falcataria* leaf extract significantly affected (P<0.05) the RDP, RUP, and CPD values. RDP and CPD values decreased as tannin levels increased, whereas RUP values increased. The lowest RDP value (63.48%) and the lowest CPD value (60.76%) were observed in treatment P3, while the highest RUP value (36.52%) was also recorded in the same treatment. The study concludes that the application of condensed tannins from *Albizia falcataria* leaf extract effectively protects SBM protein against ruminal microbial degradation, with the optimal level observed at 6%.]]>
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