نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی دانشگاه بیرجند، ایران
2 دکتری تغذیه دام، ایستگاه تحقیقات شتر و گونه‌های مرتعی خراسان جنوبی
3 موسسه تحقیقات علوم دامی کشور، تخصص: تغذیه نشخوارکنندگان-مسول بخش تحقیقات تغذیه.
4 دانشجوی دکتری بخش علوم دام، دانشکده کشاورزی دانشگاه بیرجند، بیرجند، ایران
چکیده
هدف از پژوهش حاضر، تعیین ارزش غذایی گیاه خارشتر با استفاده از روشهای درونکیسهای و تولید گاز و مقایسه آن با علف خشک یونجه بود. نمونه‌های علوفه به‌صورت دستی برداشت و ترکیب شیمیایی و فنولی آن طبق روشهای توصیه‌شده آزمایشگاهی تعیین شد. هم‌چنین از روشهای تولید گاز، کیسه‌های نایلونی و هضم سه مرحله‌ای آنزیمی برای تعیین ارزش غذایی نمونه‌ها استفاده شد. میزان ماده آلی، پروتئین خام و کلسیم خارشتر پایین‌تر از علف خشک یونجه بود (05/0P<)، درحالی‌که الیاف نامحلول در شوینده خنثی، الیاف نامحلول در شوینده اسیدی، لیگنین، خاکستر و فسفر گیاه خارشتر به‌طور معنیداری بیش‌تر بود (05/0P<). میزان کل ترکیبات فنولی، تانن کل، تانن متراکم و تانن قابل هیدرولیز گیاه خارشتر نیز بالاتر از علف خشک یونجه بود (05/0P<). بخش سریع‌تجزیه، کُند تجزیه و نرخ ثابت تجزیه گیاه خارشتر و علف خشک یونجه اختلاف معنیداری نداشتند. اما، تجزیه‌پذیری مؤثر گیاه خارشتر از علف خشک یونجه کم‌تر بود (05/0P<). نرخ ثابت تولید گاز (c) گیاه خارشتر و علف خشک یونجه با یکدیگر مشابه بودند، با این‌حال، پتانسیل تولید گاز (b) آن از علف خشک یونجه کم‌تر بود (05/0P<). گوارشپذیری ماده آلی، انرژی قابل سوختوساز و انرژی خالص شیردهی نیز در گیاه خارشتر کم‌تر از علف خشک یونجه برآورد شد (05/0P<). براساس نتایج این پژوهش، گیاه خارشتر با ترکیب شیمیایی و فراسنجه‌های گوارشپذیری مناسب و هزینه تولید کم‌تر در مقایسه با علف خشک یونجه، امکان جایگزینی با بخشی از علوفه جیره شتر را دارد.
کلیدواژه‌ها
عنوان مقاله [English]
Comparison of chemical composition, gas production parameters and digestibility of Alhaji camelorum plant and alfalfa hay using nylon bag and gas production techniques
نویسندگان [English]
- Navid Ghavipanje 1
- Seyyed Ahmad Hosseini 2
- alireza aghashahi 3
- Mojtaba Afshin 4
1 Department of Animal Science, University of Birjand, Birjand, Iran
2 Ph.D. in Animal Nutrition, South Khorasan Camel and Range Species Research Station, Birjand, Iran
3 department of animal and poultry nut.Iran animal science nutrition.areeo.Iran
4 .D. Student, Department of Animal Science, College of Agriculture, University of Birjand, Birjand, Iran.
چکیده [English]
The aim of the present study was to determine the nutritive value of Alhaji camelorum plant using nylon bag and gas production techniques which compared with alfalfa hay. Fodder samples were hand harvested and its chemical and phenolic composition was determined according to standard laboratory methods. The methods of gas production, nylon bags and three-step enzymatic digestion were used to determine the nutritive value of the samples. The amount of organic matter, crude protein and Ca of Alhaji camelorum was lower than alfalfa hay (P<0.05). Wheras, the neutral detergent fiber, acid detergent fiber, lignin, ash and phosphorus content of Alhaji camelorum were significantly higher than alfalfa hay (P<0.05). The amount of total phenolic compounds, total tannin, condensed and hydrolyzable tannin of Alhaji camelorum was also higher than alfalfa hay (P<0.05). There was no significant difference between the fast degradable, slow degradable and degradablity rates of Alhaji camelorum and alfalfa hay. However, the effective degradability of Alhaji camelorum was lower than alfalfa hay (P<0.05). Gas production rate (c) of Alhaji camelorum and alfalfa was similar, however, its gas production potential (b) was lower than alfalfa hay (P<0.05). Organic matter digestibility, metabolizable energy, and net energy for lactation were also estimated to be lower in Alhaji camelorum than alfalfa hay (P<0.05). According to the results of the present research, Alhaji camelorum plant with appropriate nutritional caractristics and digestibility parameters along with its lower production cost compare to alfalfa hay, can be replaced with a part of the forage of camel diet.
کلیدواژه‌ها [English]
- Alhaji camelorum
- Digestibility
- Gas production parameters
- Nylon bag technique
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