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INFLUENCE OF DIETARY PROTEIN ON THE FRACTIONATION OF SELENIUM IN THE RUMEN OF SHEEP

Serra, A.B.    (Central Luzon State University   ); Serra, S.D.    (Faculty of Life and Environmental Science (formerly Faculty of Agriculture), Shimane University   ); Fujihara, T.    (Faculty of Life and Environmental Science (formerly Faculty of Agriculture), Shimane University  );
  • 초록

    The effects of diets differing in protein content through soybean meal supplementation on ruminal fractionation of selenium (Se) were studied. A $3{\times}3$ Latin square design was used with three Japanese Corriedale wethers (45 kg average body weight), three periods, and three dietary treatment. The three dietary treatments were : Diet 1, without soybean meal supplementation (14% crude protein, CP); Diet 2, with 10% soybean meal supplementation (16.5% CP); and Diet 3, with 20% soybean meal supplementation (19% CP). All the diets had a Se supplementation in the form of sodium selenite at 0.2 mg Se/kg dietary DM. The Se supplement and the concentrate mixture were fed only in the morning before the hay was given. Daily feeding schedule for gay was set at 09:00 and 17:00 h. On the final day of collection period, ruminal fluid samples were obtained at 0.5, 2, 6, 12 and 24 h post-feeding starting at 09:00 h. Total ruminal fluid Se was markedly higher (p $655{\mu}g/kg$ bacterial DM for Diet 1, 2 and 3, respectively. No differences (p>0.05) were observed on ruminal pH, ammonia and total nolatile fatty acids although increasing protein supplementation tended to decline the ruminal pH and increase ruminal ammonia. This study concludes that increasing dietary protein content by soybean meal supplementation can affect the ruminal Se metabolism.


  • 주제어

    Selenium .   Selenite .   Ruminal Selenium .   Bacterial Selenium .   Ruminal Ammonia .   Volatile Fatty Acid .   Sheep.  

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