Effect of heat‐treated green tea waste feeding on fermentation kinetics, in vitro degradability, in vivo apparent digestibility, nitrogen balance, and blood metabolites in Black Bengal goat

Abstract

The study was conducted to examine the effect of heat treatment of green tea waste (GTW) on rumen degradability, apparent digestibility, and plasma metabolites in Black Bengal goat based on in vitro and in vivo studies. The in vitro incubation was performed with autoclaved, oven, and freeze-dried GTW, whereas animal study was conducted using 12 Black-Bengal goats in a 3 Â 3 Latin-square design. Goats were fed a total-mixed-ration without (control) or with the partial replacement of soybean meal and barley with 50 g/kg dry matter (DM) of either oven-dried or autoclaved GTW. Heat treatments reduced ether extract and tannins concentration but increased the effective DM and crude protein (CP) degradability of GTW. The highest values of in vitro volatile fatty acid concentration, molar proportion of propionate, ammonia-nitrogen concentration, and cumulative gas production were observed for oven-dried GTW among the tested GTW. Dietary treatment did not alter the DM intake, but apparent CP digestibility and retained nitrogen (N) were increased in goats fed control or oven-dried GTW incorporated diets. Feeding autoclaved GTW diet increased the urinary and fecal N excretion in goats. In contrast, plasma glucose concentration was highest in goats fed control or oven-dried GTW diet. In conclusion, oven drying could be a practical approach to increase protein digestibility and retained N in goats.

Effects of Dietary Supplementation with Tea Residue on Growth Performance, Digestibility, and Diarrhea in Piglets

“…When piglets are weaned, because their digestive system is not yet mature, piglets often have problems such as insufficient secretion of gastric acid and low activity of digestive enzymes in the intestine, which cause a decrease in the digestion and absorption of nutrients in the diet of weaned piglets and affect their growth performance [34]. Mohammed Rashed Chowdhury showed that feeding a diet supplemented with heat-treated green tea increased the apparent crude protein digestibility of Black Bengal goats [35]. Studies showed that the addition of fermented tea residue (equal percentage replacement of concentrate supplement) had no significant effect on the digestibility of organic matter, crude protein and dry matter in lake goats [36].…”

Effects of Dietary Supplementation with Tea Residue on Growth Performance, Digestibility, and Diarrhea in Piglets

“…When piglets are weaned, because their digestive system is not yet mature, piglets often have problems such as insufficient secretion of gastric acid and low activity of digestive enzymes in the intestine, which cause a decrease in the digestion and absorption of nutrients in the diet of weaned piglets and affect their growth performance [33]. Mohammed Rashed Chowdhury showed that feeding a diet supplemented with heat-treated green tea increased the apparent crude protein digestibility of Black Bengal goats [34]. Studies showed that the addition of fermented tea residue (equal percentage replacement of concentrate supplement) had no significant effect on digestibility of organic matter, crude protein and dry matter in lake goats [35].…”