تعیین تجزیه پذیری شکمبه ای کنجاله سویا فرایند شده با زایلوز به روش کیسه های نایلونی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد گروه علوم دامی دانشگاه آزاد اسلامی واحد کرج

2 دانشیار گروه علوم دامی دانشکده کشاورزی دانشگاه زنجان

چکیده

این آزمایش به‌‌منظور تعیین تجزیه‌پذیری ماده خشک و پروتئین خام کنجاله سویا و کنجاله سویا فرایند شده با زایلوز در شکمبه، با استفاده از سه راس گاو ماده هلشتاین فیستولاگذاری شده از ناحیه شکمبه به روش کیسه‌های نایلونی انجام شد. هر کیسه حاوی 5/7 گرم نمونه برای زمان های 0، 2، 4، 8، 16، 24 و 48 ساعت جهت قرار گرفتن در شکمبه بود. در کنجاله سویا فرایند شده با زایلوز، بخش سریع تجزیه شونده (a) ماده خشک نسبت به کنجاله سویا کمتر بود (21 در برابر 27 درصد). بخش سریع تجزیه شونده (a) پروتئین خام کنجاله سویا فرایند شده با زایلوز نیز به طور معنی‌داری کمتر بود (3 در برابر 20 درصد). درصورتی‌که بخش کند تجزیه شونده (b) پروتئین خام در کنجاله سویا فرایند شده با زایلوز افزایش معنی‌داری را نشان داد (84 در برابر 78 درصد). تجزیه‌پذیری موثر پروتئین خام در سرعت‌های عبور 5 و 8 درصد در ساعت، برای کنجاله سویا فرایند شده با زایلوز به طور معنی‌داری کمتر از کنجاله سویا بود (27 و 20 در برابر 62 و 53 درصد). بنابراین می‌توان نتیجه گرفت که در اثر فرایند کنجاله سویا با زایلوز نسبت پروتئین عبوری از شکمبه در مقایسه با کنجاله سویا افزایش می‌یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Rumen degradability of xylose-treated soybean meal determined with nylon bag Technique (in situ)

نویسندگان [English]

  • M. Jahani Moghadam 1
  • H. Amanlou 2
1 Former M.Sc. Student, Department of Animal, Science, Islamic Azad University of Karaj
2 Associate Professor, Department of Animal Science, Faculty of Agriculture, Zanjan University
چکیده [English]

A ruminal in situexperiment using three ruminally fistulated multiparous non-lactating dairy cows was conducted to determine dry matter (DM) and crude protein (CP) degradation of soybean meal and xylose-treated soybean meal. Samples were suspended in the rumen of cows for 0, 2, 4, 8, 16, 24 and 48 h. Xylose-treated  soybean meal had higher soluble digestible fraction (a) of DM than soybean meal (21% vs. 27%). Soluble digestible fraction (a) CP of xylose-treated soybean meal was considerably lower than that of soybean meal (3% vs. 20%). Xylose-treated soybean meal showed higher slowly digestible fraction (b) CP than soybean meal (84% vs. 78%). Effective degradability of CP at outflow rates of k= 0.05 and k= 0.08 h-1 was significantly lower for xylose-treated soybean meal than soybean meal (27 and 20% vs. 62 and 53%). Results from this study showed that xylose-treated soybean meal had lower available protein for rumen microorganisms compared with soybean meal.

کلیدواژه‌ها [English]

  • Crude protein (CP)
  • Degradability
  • Dry matter (DM)
  • Xylose-treated soybean meal
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