| The present experiment conducted to investigate the effect of processing broiler litter with different levels of tannin extracted from pomegranate peel on in vitro rumen digestion and fermentation, rumen fungi and bacteria growth using completely randomized design in Ramin Agriculture and Natural Resources University of Khuzestan. Dietary treatments were adding pomegranate peel extract to broiler litter at levels 0, 5, 10, 15, 20, 25, 30 and 35 percent of dietary dry matter (DM). The gas and potential of gas production were constant with increasing level of pomegranate peel extract up to 20 and 15 percent, respectively. Rate of gas production was similar between treatments, except for diets containing 20 and 35 percent of pomegranate peel extract which decreased significantly (P<0.05). Increasing the level of pomegranate peel extract decreased rumen ammonia nitrogen concentration, but increased partitioning factor, microbial protein production and efficiency of microbial protein compared to control diet (P<0.05). Highest and lowest two-step crude protein digestibility was observed in diets containing 15 and 35 percentage pomegranate peel extract, respectively (P<0.05). After three days incubation of diets in specific rumen bacteria medium with increasing level of pomegranate peel extract, DM digestibility and ammonia nitrogen concentration decreased (P<0.05). Dry matter digestibility in all of investigated times were constant by incubation of treatments containing pomegranate peel extract in specific rumen fungi medium. According to the results, processing of broiler litter with pomegranate peel extract up to 25 percent of dry matter has potential to improve nitrogen metabolism in ruminants without any negative effects on nutrients digestibility. |
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