بررسی اثر منابع آلی و غیرآلی در باند کردن عناصر معدنی در شرایط برون تنی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم دامی، دانشگاه آزاد اسلامی واحد شبستر، شبستر، ایران

2 استاد بخش تحقیقات تغذیۀ دام و طیور، مؤسسۀ تحقیقات علوم دامی کشور، کرج، ایران

3 دانشیار گروه علوم دامی، دانشگاه آزاد اسلامی واحد شبستر، شبستر، ایران

4 استادیار گروه علوم دامی، دانشگاه آزاد اسلامی واحد شبستر، شبستر، ایران

چکیده

در این آزمایش، توانایی پلی‏ساکاریدهای غیرنشاسته‏ای از دو منبع گندم و جو به‌عنوان منابع آلی و پرلیت به‌عنوان منبع غیرآلی در باندکردن کاتیون‏های منگنز، آهن، روی، و مس در شرایط برون‏تنی بررسی شد. مقدار رطوبت، پروتئین، خاکستر، عصارۀ اتری، کل کربوهیدرات، NDF، ADF، ADL، فیبر خام، ویسکوزیته، سلولز، همی‏سلولز، کل فیبر جیره‏ای گندم، و جو اندازه‏گیری شد. ظرفیت باندکردن منگنز، روی، آهن، و مس در شرایط فیزیولوژیکی تقلیدشدۀ معده، روده، و کولون در گندم، جو و پرلیت در شرایط آزمایشگاه اندازه‏گیری و مقایسه شد. تیمار اسیدی موجب حذف بیشتر مواد معدنی اندوژنوس به‏جز آهن شد. دانۀ جو بیشترین ظرفیت باندکردن عناصر مس (48/44 درصد)، روی (07/11 درصد)، و منگنز (16/5 درصد) را در شرایط رودۀ کوچک؛ و پرلیت ظرفیت باندکردن کمتر برای عناصر مس (41/1 درصد)، روی (74/1 درصد)، و منگنز (76/0 درصد) را در مقایسه با جو و گندم نشان داد. بیشترین مقدار خروج مواد معدنی در شرایط اسیدی در هر سه مادۀ خوراکی به‌ترتیب برای عناصر منگنز، روی، مس و آهن بود و بیشترین مقدار باندشدن در منابع آلی در شرایط تقلیدشدۀ رودۀ کوچک به‌ترتیب به عناصر آهن، مس، روی، و منگنز تعلق داشت. نتایج تحقیق حاضر نشان داد که الیاف جیره‏ای قابلیت دسترسی مواد معدنی را کاهش می‏دهند.

کلیدواژه‌ها


عنوان مقاله [English]

In vitro binding capacity of organic and inorganic sources for minerals

نویسندگان [English]

  • Ali Ghodrat 1
  • Akbar Yaghobfar 2
  • Yahya Ebrahimnezhad 3
  • Habib Aghdam Shahryar 4
  • Abolfazl Ghorbani 4
1 Ph.D. Candidate, Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran
2 Professor, Department of Animal and Poultry Nutrition, Animal Science Research Institute, Karaj, Iran
3 Associate Professor, Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran
4 Assistant Professors, Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran
چکیده [English]

This study was carried out to determination of in vitro binding capacity of organic (wheat and barley) and inorganic (perlite) sources for Mn, Zn, Cu, and Fe. For this reason wheat and barley were analyzed chemically for moisture, protein, ash, and ether extract, total carbohydrate, NDF, ADF, ADL, crude fiber, viscosity, cellulose, and total dietary fiber. The in vitro mineral binding capacity of wheat, barley, and perlite to Mn, Zn, Fe, and Cu under sequential simulated physiological conditions of the stomach, small intestine, and colon was investigated and compared. Acid washing was efficient in removing most endogenous minerals from samples with the exception of Fe. Barley showed the highest mineral binding capacity for Mn (5.16 percent), Zn (11.07 percent), and Cu (44.48 percent) in small intestine. Perlite had lower mineral binding capacity (Mn (0.76 percent), Zn (1.74 percent) and Cu (1.41 percent) than wheat and barley. Organic sources had an affinity for Fe > Cu > Zn > Mn. Dietary Fiber had a negative impact on mineral bioavailability.

کلیدواژه‌ها [English]

  • Barley
  • dietary fiber
  • mineral binding
  • Perlite
  • Wheat
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