بررسی هضم و تخمیر جیره‌های حاوی بخش‌های متفاوت درخت سوبابل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه علوم دامی، دانشکدۀ علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان

2 دانشیار، گروه علوم دامی، دانشکدۀ علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان

3 استادیار، گروه علوم دامی، دانشکدۀ علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان

چکیده

قابلیت هضم و فراسنجه‌های تخمیری جیره‌های حاوی برگ، غلاف، و دانۀ درخت سوبابل (با نام علمی Leucaena leucocephala) در گوسفند با روش‌‌‌‌های هضم دومرحله‌ای و تولید گاز تعیین شد. جیره‌های آزمایشی شامل صفر (شاهد)، 25، 50، 75، و 100درصد برگ، غلاف، و دانۀ سوبابل بودند که جایگزین علوفۀ یونجه در جیرۀ گوسفندان شدند. در مقایسه با جیرۀ شاهد، جیرۀ حاوی 50درصد دانۀ سوبابل تولید گاز بیشتری داشت (05/0>P). در بین جیره‌های حاوی برگ سوبابل بیشترین مقدار مادۀ آلی واقعاً هضم‌شده مربوط به سطح 100درصد برگ سوبابل بود. سطح 100درصد جایگزینی با یونجه در مقایسه با سایر مقادیر جایگزینی غلاف، بیشترین عامل تفکیک‌کننده و بازده تولید تودۀ میکروبی را داشت (05/0>P). قابلیت هضم مادۀ خشک، الیاف نامحلول در شویندۀ خنثی و اسیدی جیره‌های حاوی غلاف در همۀ سطوح، کمتر از جیرۀ شاهد بود (05/0>P). قابلیت هضم الیاف نامحلول در شویندۀ‌‌ خنثی و اسیدی در جیره‌های حاوی برگ سوبابل تا سطح 75درصد جایگزینی برگ سوبابل با یونجه تفاوتی با شاهد و با یکدیگر نداشتند. با افزایش مقدار دانۀ سوبابل در جیره قابلیت هضم مادۀ خشک، الیاف نامحلول در شویندۀ‌‌ خنثی و اسیدی از جیرۀ شاهد بیشتر بود، به‏طوری‌که اختلاف برای سطوح 75 و 100درصد دانۀ سوبابل معنی‏دار بود (05/0>P). براساس نتایج تحقیق حاضر، برگ و دانۀ سوبابل را می‌‌توان بدون وجود اثر منفی بر هضم و تخمیر تا 100درصد جایگزین یونجه کرد. استفاده از دانۀ سوبابل به‌صورت جایگزین با یونجه در جیرۀ گوسفندان می‌‌تواند ارزش غذایی جیره را افزایش دهد.

کلیدواژه‌ها


عنوان مقاله [English]

The investigation of digestion and fermentation of diets containing different parts of Subabul tree (Leucaena leucocephala)

نویسندگان [English]

  • Shahin Nasimi Esfahani 1
  • Morteza Chaji 2
  • Tahereh Mohammadabadi 3
  • Mohammad Bojarpour 3
1 M.Sc., Department of Animal Science, Faculty of Animal and food Sciences, Ramin Agriculture and National Resources, University of Khuzestan, Iran
2 Associate Professor, Department of Animal science, Faculty of Animal and Food Sciences, Ramin Agriculture and National Resources University of Khuzestan, Iran
3 Assistant Professor, Department of Animal Science, Faculty of Animal and Food Sciences, Ramin Agriculture and National Resources University of Khuzestan, Iran
چکیده [English]

The digestibility and fermentation parameters of the diets containing leaf, pod and seed of the Subabul tree in sheep was determined by using two steps digestion and gas production (GP) methods. The experimental diets consisted of 0.0 (control), 25, 50, 75 and 100 percent of the leaf, pod and seed of the Subabul tree that were replaced with alfalfa in diets of sheep. Diets containing 50 percent seed of the Subabul had higher GP compared to the control diet (P<0.05). The highest true digestibility of organic matter in Subabul leaf was belonged to diet contains 100 percent leaf. The diet contain 100 percent had the highest partitioning factor (PF) and microbial biomass efficiency (P<0.05) compared to other levels of the Subabul pod. The digestibility of DM, NDF and ADF of diets contain the pod of the Subabul tree for all levels were less than control (P<0.05). There are no significant differences between digestibilities of NDF and ADF of diets contain up to 75 percent the leaf of the Subabul tree and others diets. Digestibility of DM, NDF and ADF was more than control diet (P<0.05) by increasing the amount of the seed of the Subabul tree in the diets (75 and 100 percent of the seed of the Subabul). According to the results, the leaf and seed of the Subabul can be replaced up to 100 percent with alfalfa in the diets of sheep without any negative effect on fermentation and digestion. The nutritional value of sheep diets can be improved by replacing the alfallfa with Subabul tree seeds.

کلیدواژه‌ها [English]

  • chemical composition
  • digestibility
  • Gas production
  • microbial biomass production
  • partitioning factor
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