Substitution effect of protein source with tea waste on productive performances and ruminal fermentation in crossbred Saanen lactating goats

Tea waste (TW) has a protein content of approximately 30% and the potential to replace other sources. However, effect dietary TW supplement is still ambiguous. The objective this study was investigate three levels on performances physiological changes in goats. Nine multiparous crossbred Saanen lactating goats were arranged replicates 3 × Latin square. groups fed with 0, 5, or 10 by weight [wt%] dry matter [DM] basis TW, respectively, for 21-day period. All diets total mixed ration (TMR) containing 40:60 (DM basis) ratio concentrate: roughage. weighed at 15 21 days. Faeces urine collected during last 7 days each addition had no DM intake (DMI), DMI% body weight. milk wt% diet significantly higher (p < 0.05) than that diets. lactose both decreased when compared control 0.01). Goats 5 tended decrease digestibility crude = 0.10). There digestibility, blood glucose, urea nitrogen, triglyceride, protein, ruminal pH, ammonia-nitrogen, volatile fatty acids, acetic acid (A), propionic (P), A:P ratio, nitrogen balance, allantoin excretion methane emission among treatments. Diets could be used plant sources.HighlightsThe tea replaced as source up 10% goat feed intake, profile production.The increased dairy goat.Low dose condensed tannin provided more absorption small intestine reducing NH3–N level.