اثر جايگزيني يونجه با غلاف سوبابل (Leucaena leucocephala ) بر قابليت هضم، تخمير آزمايشگاهي و تجزيه‌پذيري (in situ) در گاو و گاوميش

Effect of replacing alfalfa with subabul (Leucaena leucocephala) pod on digestibility, in vitro fermentation and in situ degradability in cow and buffalo

اين آزمايش به منظور بررسي تاثير جايگزيني يونجه با غلاف سوبابل (0، 9 و 18 درصد ماده خشك) بر قابليت هضم، تخمير آزمايشگاهي و تجزيه ­پذيري شكمبه ­اي در گاو و گاوميش فيستوله شده انجام شد. تخمير جيره­ هاي آزمايشي با توليد گاز، قابليت هضم با تلي و تري و تجزيه ­پذيري با روش كيسه­ هاي نايلوني تعيين شد (چهار تكرار براي هر جيره) و داده ­ها در قالب طرح كرت­ه اي خرد شده تجزيه شدند. قابليت هضم ماده خشك و الياف نامحلول در شوينده خنثي و اسيدي در جيره ­هاي حاوي سطوح مختلف غلاف سوبابل بين گاو و گاوميش تفاوتي نداشت (0/05P). جايگزيني يونجه با غلاف سوبابل اثري بر نرخ توليد گاز، توليد توده ميكروبي و ديگر فراسنجه­ هاي تخميري در گاو و گاوميش نداشت (0/05P). جايگزيني يونجه با غلاف سوبابل، فراسنجه­ هاي تجزيه ­پذيري شكمبه­ اي در گاو و گاوميش را تحت تاثير قرار نداد (0/05

This experiment was conducted to investigate effect of replacing alfalfa with subabul pod (0, 9 and 18 % of DM) on digestibility, in vitro fermentation and ruminal degradability in fistulated cow and buffalo. Fermentation of experimental diets was determined by gas production, digestibility by tilly and terry and degradability by in situ (4 replicates per diet) and the data were analyzed by split plot design. Digestibility of dry mater, NDF and ADF of diets containing different levels of subabul pod were not different in cow and buffalo (P>0.05). But potential of gas production in diets containing subabul pod was lower than control diet (P<0.05). However, replacing alfalfa with subabul pod didn’t affect gas production rate, microbial biomass and other fermentative parameters in cow and buffalo (P>0.05). Cell wall degradability was greatest for control treatment (in buffalo 23.9 % and cow 35.9 %, respectively) and the lowest value was for diet containing 18 % subabul pod (in buffalo 64.1% and cow 64.3%, respectively) (P<0.05). Replacement of alfalfa with subabul pod did not influence degradability parameters in cow and buffalo (P>0.05). According the result, replacement of alfalfa hay with subabul pod in cow and buffalo diet, didn’t affect in vitro digestibility and gas production parameters, but improved in situ ruminal degradability. Therefore, it seems 50 % subabul pod can be used instead of alfalfa in cow and buffalo nutrition.