A Comparison of Apparent Digestibility of Nutrient in Caspian Horse Feeds as Determined by Total Collection of Faeces, Acid Insoluble Ash and Lignin Methods
محورهای موضوعی : Camelس. اربابی 1 , ت. قورچی 2 , ر. پرور 3
1 - Department of Animal and Poultry Nutrition, Faculty of Animal Science, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
2 - Department of Animal and Poultry Nutrition, Faculty of Animal Science, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
3 - Department of Animal and Poultry Nutrition, Faculty of Animal Science, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
کلید واژه: digestibility, ADL, AIA, Caspian horse, internal markers,
چکیده مقاله :
The aim of this research is to compare indigestible internal markers acid insoluble ash (AIA) and acid detergent lignin (ADL) and total collection of faeces (TCF) for apparent digestibility estimation in Caspian horse. Analyses were carried out on wheat straw, alfalfa, barley and maize, for dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF) and acid detergent fiber (ADF). Using change over design including 4 ration diet, 4 period and each period was 12 days with 4 Caspian horse with 3-5 years age and reared in individual cages. The results digestibility of DM, OM, NDF, ADF did not show any significant differences among the ADL, AIA and total collection of faeces methods, but digestibility of CP and EE were significantly higher than the ADL and AIA methods. A weak correlation was found between total collection techniques and AIA, for crude fat (EE) and ADF, whereas there was a high correlation (R2=0.89) between AIA and total collection of faeces for the digestibility of crude protein. The results obtained in this study show that there were no significant difference between internal markers (acid-insoluble ash and acid detergent lignin) and total collection techniques of faeces for estimation apparent digestibility of nutrients in Caspian horses.
هدف از این پژوهش مقایسه مارکرهای داخلی غیر قابل هضم خاکستر نامحلول در اسید (AIA)، لیگنین (ADL) و روش جمعآوری کل مدفوع (TCF) جهت تخمین قابلیت هضم ظاهری مواد مغذی در اسبچه خزر بود. مواد خوراکی مورد استفاده شامل کاه گندم، یونجه، جو و ذرت به منظور تعیین ماده خشک، ماده آلی، پروتئین خام، عصاره اتری، فیبر نامحلول در شوینده خنثی (NDF) و فیبر نامحلول در شوینده اسیدی (ADF) تجزیه شدند. این آزمایش در قالب طرح چرخشی با 4 جیره خوراکی در طی 4 دوره زمانی 12 روزه با 4 اسب 3 تا 5 ساله در قفسهای انفرادی اجرا گردید. نتایج قابلیت هضم ماده خشک، ماده آلی، فیبر نامحلول در شوینده اسیدی و فیبر نامحلول در شوینده خنثی بین سه روش لیگنین نامحلول در شوینده اسیدی، خاکستر نامحلول در اسید و جمعآوری کل مدفوع، تفاوت معنیداری مشاهده نشد، اما قابلیت هضم پروتئین خام و چربی با روشهایADL وAIA به طور معنیداری بالاتر بود. همبستگی ضعیفی بین دو روشTCF و AIA جهت قابلیت هضم ظاهری چربی خام وADF وجود داشت. در حالی که همبستگی بالایی (89/0R2=) بین دو روش AIA و TCF جهت قابلیت هضم پروتئین خام مشاهده شد. نتایج این مطالعه نشان داد که تفاوت معنیداری بین مارکرهای داخلی (AIA و ADL) و روش جمعآوری کل مدفوع جهت تخمین قابلیت هضم ظاهری مواد مغذی در اسبچه خزر وجود ندارد.
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