اثر کنجاله سویای فرایند شده با زایلوز بر عملکرد گاو‌های شیری در اوایل دوره شیردهی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد گروه علوم دامی دانشگاه آزاد اسلامی واحد کرج

2 دانشیار گروه علوم دامی دانشگاه زنجان

3 عضو گروه علمی شرکت تهران دانه

4 استادیار گروه علوم دامی دانشگاه آزاد اسلامی واحد کرج

5 دانشجوی دکتری گروه علوم دامی دانشگاه زنجان

چکیده

تعداد 8 راس گاو هلشتاین (4 راس زایش اول و 4 راس زایش سوم) در یک طرح مربع لاتین 4×4 با 4 دوره‌ آزمایشی 21 روزه به منظور تعیین ارزش کنجاله سویا فرایند شده با زایلوز به عنوان مکمل پروتئین غیرقابل تجزیه در جیره‌های براساس جو برای گاوهای شیری استفاده شدند. جیره‌ها حاوی صفر، 5/4، 9 و 7/13 درصد کنجاله سویا فرایند شده با زایلوز بودند. تولید شیر، شیر تصحیح شده براساس 4 درصد چربی، انرژی شیر، مقدار چربی، پروتئین، لاکتوز، مواد جامد بدون چربی و کل مواد جامد شیر توسط تغذیه کنجاله سویا فراینده شده با زایلوز افزایش یافت. درصد چربی، پروتئین، لاکتوز، مواد جامد بدون چربی و کل مواد جامد شیر در بین تیمارها تفاوت معنی‌داری نداشت. مصرف ماده خشک، پروتئین خام و انرژی، گلوکز، آلبومین و کل پروتئین خون و  pHشکمبه، مدفوع و ادرار و تغییرات وزن بدن تحت تاثیر تیمارها قرار نگرفت. بازده خوراک، پروتئین خام و انرژی توسط تیمارها به وسیله جایگزینی کنجاله سویا با کنجاله سویا فرایند شده با زایلوز بهبود یافت(05/0>P) اما تحت تاًثیر تعداد زایش قرار نگرفت. افزایش نسبت کنجاله سویا فرایند شده با زایلوز در جیره‌ها، نیتروژن اوره‌ای خون را کاهش داد.  نتایج این آزمایش  نشان داد افزایش نسبت کنجاله سویا فرایند شده با زایلوز در جیره‌های بر اساس جو توان تولید شیر گاوهای شیری را در اوایل دوره شیردهی افزایش می‌دهد.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of xylose-treated soybean meal on performance of dairy cows in early lactation period

نویسندگان [English]

  • M. Jahani Moghadam 1
  • H. Amanlou 2
  • F. Fard 3
  • A. R. Noshari 4
  • M. Hossein Yazdi 5
1 M.Sc. graduated Student, Department of Animal, Science, Islamic Azad University of Karaj
2 Associate Professor, Department of Animal Science, Zanjan University
3 Department Member of Tehran Daneh Company
4 Assistant Professor, Department of Animal Science, Islamic Azad University of Karaj
5 Ph.D Student, Department of Animal Science, Zanjan University
چکیده [English]

Eight Holstein dairy cows (4 primiparous and 4 multiparous) were used in a replicated 4×4 Latin square design with four 21-d periods to investigate effects of xylose-treated soybean meal (XSBM) as a source of ruminal undegradable protein in early lactation cows fed barley-based diets. Treatments were diets with XSBM ratios of (1) 0% (control), (2) 4.5%, (3) 9% and (4) 13.7%5, on a dry matter DM basis. Milk production, 4%FCM, milk energy, milk protein, lactose, solids-non-fat and total solids yield were increased by feeding XSBM. Milk fat, protein, lactose, solids-non-fat and total solids percent were not different among treatments. Intake of dry mater, crude protein and energy, blood glucose, albumin and total protein, rumen, fecal and urine pH and changes in body weight were not affected by treatments. Feed, crude protein and energy efficiency were improved by substitution XSBM for soybean meal but not by parity. Increasing dietary XSBM in the ration reduced blood urea N. Results of this study showed that increasing dietary XSBM ratio improved milk production in early lactation cows fed diets based on barley.

کلیدواژه‌ها [English]

  • Barley
  • Dairy cows
  • Early lactation period
  • Parity
  • Xylose-treated soybean meal

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