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2093 TIAN Xing-zhou et al. Journal of Integrative Agriculture 2018, 17(9): 2082–2095 the small intestine for digestion and absorption. However, based on the present study, some chemical composition parameters in both silages were so significantly different that it was difficult to identify clearly whether the difference in rumen fermentation was responsible for the amount of anthocyanin or chemical composition difference. An interesting perspective on anthocyanins showed that they have the potential to be absorbed into milk, thereby improving consumers’ health. In this regard, additional experimental data based on in vivo studies are needed to verify the effect of antioxidant activity for dairy ruminants. 5. Conclusion This was the first study to investigate the effects of anthocyanin-rich PSS on anthocyanin composition during the ensilage period, on its extract for DPPH scavenging activity, and on ruminal fermentation of Saanen dairy goats in vitro . The present study indicated that although the anthocyanins content in anthocyanin-rich PS declined during the ensilage period, it could be maintained in a stable condition. The anthocyanin-rich PSS showed excellent silage fermentative quality, higher level of anthocyanins, and stronger antioxidant activity compared to the SSS. Additionally, anthocyanin-rich PSS had no negative effect on rumen fermentation parameters. Thus, anthocyanin- rich PSS has the potential to become an ideal roughage for ruminants. Further studies are needed to determine the mechanism of feeding anthocyanin-rich PSS on rumen microorganisms, plasma antioxidant activities, expression of oxidative stress-related genes, and milk production in dairy ruminants. Acknowledgements The authors would like to thank the SUT Farm and the Center for Scientific and Technological Equipment, SUT, which provided the planting site and chemical analysis facilities for this study. 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