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استفاده از باکتریهای مصرف کننده اسید و بافرهای مختلف برای بهبود هضم و تخمیر جیرههای پرکنسانتره | ||
تحقیقات تولیدات دامی | ||
دوره 11، شماره 4، بهمن 1401، صفحه 21-36 اصل مقاله (1.11 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/ar.2023.22294.1705 | ||
نویسندگان | ||
فرشته وفایی1؛ مرتضی چاجی* 2 | ||
1دانشآموخته کارشناسی ارشد تغذیه دام، گروه علوم دامی، دانشکده علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
2استاد، گروه علوم دامی، دانشکده علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
چکیده | ||
این پژوهش با هدف مطالعه تاثیر استفاده از باکتری مصرف کننده اسید و بافرهای مختلف شیمیایی بر قابلیت هضم و تخمیر جیرههای پرکنسانتره انجام شد. فراسنجههای تولید گاز تعداد ۱۲ تیمار آزمایشی شامل ۱- جیره شاهد (یا پایه فاقد افزودنی)، ۲- جیره پایه+ سه میلی لیتر باکتری مگاسفرا السدنی (cfu/mL 10۸ × ۵/1)، ۳ تا ۱۲- یک درصد از پنج بافر بنتونیت سدیم، بیکربنات سدیم، اکسید منیزیم، زئولیت، سدیم سسکوئی کربنات به تنهایی یا همراه با باکتری مگاسفرا السدنی در زمانهای مختلف اندازگیری و محاسبه شد. اثر تیمارهای آزمایشی بر پتاسیل و نرخ تولیدگاز، عامل تفکیک، تولید توده زنده میکروبی، بازده تولید توده زنده میکروبی، pH، غلظت نیتروژن آمونیاکی و قابلیت هضم ظاهری ماده خشک و جمعیت پروتوزوآ معنیدار بود (05/0>P) و غیر از نیتروژن آمونیاکی، همه فراسنجهها در تیمارهای حاوی بافر بیشتر از شاهد بودند. بیشترین پتانسیل تولید گاز (۲۶/۶۸ میلیلیتر)، تولید توده زنده میکروبی (۳۱/۲۱۲ میلیگرم)، بازده تولید توده زنده میکروبی (۷۹ درصد) مربوط به تیمار حاوی بیکربنات سدیم + باکتری مگاسفرا السدنی بود (05/0>P). بیشترین pH و نیتروژن آمونیاکی به ترتیب مربوط به تیمار حاوی باکتری (۶۰/۶) و شاهد (۳۰/۲۷ میلیگرم در ۱۰۰ میلیلیتر) بود. کل جمعیت پروتوزوآ در تیمار بنتونیت سدیم + باکتری بیشترین مقدار بود. در کل، نتایج آزمایش حاضر نشان داد که استفاده از بافرها باعث بهبود شرایط هضم و تخمیر شدند و هر کدام از بافرها روی یک یا چند فراسنجه تاثیر بیشتری نسبت به بقیه داشتند. بهعلاوه، باکتری مصرف کننده اسید به عنوان تنظیم کننده pH، آثاری قابل رقابت با بافرهای شیمیایی به ویژه بافر بیکربنات و حتی در مواردی بهتر داشت. | ||
کلیدواژهها | ||
بافرهای شیمیایی؛ باکتری مگاسفرا السدنی؛ جمعیت پروتوزوآ؛ فراسنجههای تولید گاز؛ قابلیت هضم | ||
مراجع | ||
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