بررسی خصوصیات عملکردی و برخی متابولیت‌هـای شکمبه‌ای و خونی جیره‌های حاوی خوراک ورمی‌کمپوست در بره‌های پرواری

نوع مقاله: علمی پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد تغذیه دام، دانشگاه تبریز، تبریز، ایران.

2 استاد، استادیار و دانشیار گروه علوم دامی دانشگاه تبریز، تبریز، ایران.

3 به ترتیب استاد، استادیار و دانشیار گروه علوم دامی دانشگاه تبریز، تبریز، ایران.

4 دانشجوی دکتری تغذیه طیور دانشگاه ارومیه، ارومیه، ایران.

5 به ترتیب استاد، استادیار و دانشیار گروه علوم دامی دانشگاه تبریز، تبریز، ایران

6 دانشجوی کارشناسی ارشد تغذیه دام دانشگاه تبریز، تبریز، ایران.

چکیده

این آزمایش جهت بررسی اثرات جایگزینی خوراک ورمی­کمپوست با کنجاله سویا بر عملکرد رشد و برخی متابولیت­های شکمبه­ای و خونی بره­های نر پرواری انجام شد. برای انجام این آزمایش تعداد 16 رأس برّه نر آمیخته (قزل-مغانی) با میانگین وزن اولیه 5/2±­5/28 کیلوگرم در قالب یک طرح کاملاً تصادفی با 4 تیمار و 4 تکرار و 4 رأس بره در هر تکرار تقسیم گردید. جیره­های آزمایشی به ترتیب دارای نسبت­های 0، 33، 67 و 100 درصد خوراک ورمی­کمپوست جایگزین کنجاله سویا گردید. بره­ها با خوراک کاملاً مخلوط (با نسبت 30 درصد علوفه و 70 درصد کنسانتره) به صورت آزاد تغذیه شدند. طول دوره پرواربندی 90 روز بود. بین جیره­ها از لحاظ وزن نهایی، افزایش وزن روزانه، ماده خشک مصرفی و ضریب تبدیل غذایی تفاوت معنی­داری وجود نداشت (05/0>p). داده­های حاصل از فراسنجه­های شکمبه­ای نشان داد که جیره‌های آزمایشی بر pH و برخی اسیدهای چرب بی­تاثیر بودند (05/0>p)، ولی تیمار حاوی 100 درصد خوراک ورمی­کمپوست باعث افزایش معنی­دار میزان نیتروژن آمونیاکی شکمبه و همچنین اسید چرب استات گردید (05/0>p). جایگزین کردن خوراک ورمی­کمپوست تاثیر معنی­داری برمیزان متابولیت­های خونی نداشت، فقط نیتروژن اوره­ای خون به لحاظ عددی اندکی افزایش خطی را نشان داد (05/0>p). نتایج این مطالعه نشان می­دهد که خوراک ورمی­کمپوست با پتانسیل مواد مغذی بالا می­تواند جایگزین مناسبی برای کنجاله سویا باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating functional characteristics and selective rumen and blood metabolites in lambs fed diets containing vermicomposting feed

نویسندگان [English]

  • kian sadeghi 1
  • a Taghizadeh 2
  • h Mohamadzadeh 3
  • kh Parsaeimehr 4
  • h Janmohamadi 5
  • v Veghari 6
1 MSc Graduate of Animal Nutrition, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
2 Professor, Assistant Professor and Associate Professor (respectively), Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
3 Professor, Assistant Professor and Associate Professor (respectively), Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
4 PhD Student, Animal Nutrition, Department of Animal Science, Faculty of Agriculture, University of Urmia, Urmia, Iran.
5 Professor, Assistant Professor and Associate Professor (respectively), Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
6 MSc Student, Animal Nutrition, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
چکیده [English]

The present study was conducted to study the effects of replacing soybean meal with vermicomposting feed on growth performance and selective rumen and blood metabolites of fattening lambs. For this experiment, 16 male mixed breed lambs (Ghezel-Moghani) with an average initial weight of 20.5 ± 2.5 kg were used in a completely randomized design with 4 treatments and 4 replicates and 4 lambs in each replicate.The experimental diets, consisting of 0, 33, 67 and 100 percent vermicomposting feed replaced soybean meal. Lambs were fed freely with a diet containing 30% forage and 70% concentrate. Duration of the fattening period was 90 days. There was no significant difference (p<0.05) among the treatments in terms of final weight, average daily gain, dry matter intake and feed conversion ration. The data from the rumen metabolites indicated that diets had no effect on pH and fatty acids (p<0.05). But feed samples with 100% vermicomposting significantly increased rumen ammonia nitrogen and fatty acid acetate (p<0.05). Replacing soybean meal with vermicomposting feed did not have a significant effect on blood metabolites with the exception of blood urea nitrogen which showed a slight linear increase numerically. The results of this study shows that vermicomposting feed containing high nutrients can be a suitable replacement for soybean meal.

کلیدواژه‌ها [English]

  • Fattening lambs
  • Vermicomposting
  • Rumen and blood metabolites
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