In vitro Gas Production and Dry Matter Digestibility of Irradiated Pomegranate (Punica granatum) Seeds
محورهای موضوعی : Camel
م. زارعی
1
(Department of Animal Science, Razi University, Kermanshah, Iran)
ف. خلیلی
2
(Department of Animal Science, Razi University, Kermanshah, Iran)
پ. شورنگ
3
(Radiation Applications Research School, Nuclear Science and Technology Research Institute, Atomic Energy Organization of Iran, Karaj, Iran)
کلید واژه: digestibility, irradiation, condensed tannin, pomegranate seed,
چکیده مقاله :
The objective of this study was to determine the effect of irradiation of pomegranate seed (PS) on chemical composition, digestibility and kinetic of gas production. Pomegranate seeds were exposed to gamma ray (GR) and electron beam (EB) at doses of 5, 10, 15 and 20 kGy. Three ruminally fistulated rams were used for obtaining ruminal fluid for in vitro digestibility and gas production measurements. Irradiation had no effect on chemical composition of PS. Orthogonal contrast did not show any significant effect for EB irradiation on neutral detergent fiber % (NDF%), but GR irradiation of PS at low doses (i.e.; 5 and 15 kGy) increased NDF percentage (P<0.05). Irradiation decreased condensed tannin (CT) content of PS at all doses (P<0.01). Gas production potential (b) and gas production rate (c) of PS were decreased; but EB irradiation at doses of 5 and 20 kGy did not effect on gas production potential of PS. Irradiation treatment did not affect partitioning factor. Ionizing radiation decreased PS digestibility, but EB irradiation at a dose of 20 kGy and 5, 15 and 20 kGy did not change in vitro dry matter digestibility and organic matter digestibility. In conclusion, the result of this study suggests that ionizing radiation processing, especially EB irradiation, can be regarded as an efficient method in decreasing CT of pomegranate seeds.
هدف از این مطالعه تعیین اثر پرتوتابی تفاله هسته انار بر ترکیب شیمیایی، قابلیت هضم و کینتیک تولید گاز حاصل از آن بود. تفاله هسته انار در معرض پرتوهای گاما و الکترون در دزهای 5، 10، 15 و 20 کیلوگری قرار گرفتند. تعداد 3 رأس قوچ سنجابی برای جمعآوری مایع شکمبه در آزمایشات قابلیت هضم و تولید گاز درون آزمایشگاهی استفاده گردید. پرتوتابی اثری بر ترکیب شیمیایی تفاله هسته انار نداشت. پرتوتابی الکترون در مقایسات اورتوگونال اثر معنیداری بر فیبر نامحلول در شوینده خنثی نداشت، اما تفاله هسته انار پرتوتابی شده با اشعه گاما در دزهای پایین (یعنی در دزهای 5 و 15 کیلوگری) باعث افزایش فیبر نامحلول در شوینده خنثی گردید (05/0P<). پرتوتابی محتوای تانن متراکم تفاله انار را در تمامی دزها کاهش داد (01/0P<). پتانسیل تولید گاز (b) و نرخ تولید گاز (c) تفاله هسته انار کاهش یافت، اما پرتو الکترون در دزهای 5 و 20 کیلوگری اثری بر پتانسیل تولید گاز تفاله هسته انار نداشت. تیمارهای پرتوتابی اثری بر فاکتور تفکیک کننده نداشت. پرتوهای یونیزه کننده قابلیت هضم تفاله هسته انار را کاهش داد، اما پرتو الکترون در دز 20 کیلوگری و 5، 15 و 20 کیلوگری قابلیت هضم ماده خشک و قابلیت هضم ماده آلی را تغییر نداد. در نهایت نتایج این مطالعه نشان داد که فرآیند کردن با پرتوهای یونیزه کننده، به خصوص پرتوتابی با پرتو الکترون، میتواند به عنوان یک روش مطلوب در کاهش تانن متراکم تفاله هسته انار مورد توجه قرار گیرد.
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