نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد تغذیۀ دام، گروه علوم دامی، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان
2 دانشیار، گروه علوم دامی، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان
3 استادیار، گروه علوم دامی، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان
4 دانشجوی دکتری تغذیۀ دام، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه زابل
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The aim of present research was to investigate effects of supplementation lambs’ fattening diet with fennel and cumin powder and Saccharomyces cerevisiaein comparison with monensin on in vitro gas production and fermentation parameters, nutrient digestibility, microbial enzyme activity and protozoa population. Seven experimental diets were 1) control diet (basal diet) and supplementing control diet with 2) 8 g fennel (F) + 8 g cumin (C) powder per kg DM (1 to 1 ratio), 3) 12 g F + 4 g C (75 to 25 ratio), 4) 5 g yeast per kg diet DM, 5) 5 g yeast + 8 g F + 8 g C (1 to 1 ratio), 6) 5 g yeast + 12 g F + 4 g C (75 to 25 ratio), and 7) 30 mg monensin per kg diet DM. Diets were incubated in rumen liquor in a completely randomized design. The highest gas production during 24 and 48 h of incubation, total gas production, short chain fatty acids, organic matter digestibility and estimated metabolizable energy were observed in the diet containing yeast along with F and C (75 to 25 ratio) compared to control diet (P <0.05). Diet containing yeast along with the same ratio of F and C resulted in the highest gas production during 72 h of incubation, gas production from the insoluble, but fermentable fractions (b), filter paper degrading and α-amylase activities compared to control diet and diet containing monensin (P <0.05). The highest total protozoa population (P <0.10) and sub-family of Diplodiniinae (P≥ 0.05) was observed in control diet compared to diet supplemented with yeast along with the 1 to 1 ratio of F and C. In conclusion, we found that cumin and fennel powders along with saccharomyces cerevisiae are promising alternatives to monensin in lambs fattening diets, and that their dietary inclusion improved gas production and nutrients’ degradability by modifying rumen fermentation in vitro.
کلیدواژهها [English]