Abstract：The aim of this study was to evaluate the rumen degradation characteristics of different parts of paper mulberry (paper mulberry leaves, paper mulberry twigs and leaves and paper mulberry twigs) and commonly used roughage (alfalfa hay and oat hay) for dairy cows. Three Chinese Holstein cows with permanent ruminal cannulas were used to evaluate the ruminal degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) by nylon-bag technique. The results showed as follows:1) the CP content in paper mulberry leaves was significantly higher than that in alfalfa hay (P<0.05), while the NDF content was significantly lower than that in alfalfa hay (P<0.05). There was no significant difference in CP content between paper mulberry twigs and leaves and alfalfa hay (P>0.05), while the NDF content in paper mulberry twigs and leaves was significantly lower than that in alfalfa hay (P<0.05). There was no significant difference in CP content between paper mulberry twigs and oat hay (P>0.05), while the NDF content in paper mulberry twigs was significantly higher than that in oat hay (P<0.05). 2) There was significant difference in the DM effective degradability among five kinds of feedstuffs (P<0.05), and from high to low were paper mulberry leaves, paper mulberry twigs and leaves, alfalfa hay, oat hay and paper mulberry twigs. There was significant difference in the CP effective degradability among five kinds of feedstuffs (P<0.05), and from high to low were alfalfa hay, paper mulberry leaves, paper mulberry twigs and leaves, oat hay and paper mulberry twigs. The NDF effective degradability of paper mulberry leaves was the highest, and significantly higher than that of other four feedstuffs (P<0.05), but there was no significant difference in NDF effective degradability between paper mulberry twigs and leaves and oat hay (P>0.05). There was significant difference in the ADF effective degradability among five kinds of feedstuffs (P<0.05), and from high to low were paper mulberry leaves, oat hay, alfalfa hay, paper mulberry twigs and leaves and paper mulberry twigs. In conclusion, different parts of paper mulberry have potential value for unconventional feed resources in dairy cows.
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LIU Xiangsheng, WANG Lin, NING Lili, FENG Baobao, LIN Miao, ZHAO Guoqi. Comparison of Rumen Degradation Characteristics among Different Parts of Paper Mulberry and Commonly Used Roughages for Dairy Cows. Chinese Journal of Animal Nutrition, 2019, 31(8): 3612-3620.
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