Betaine Replacement for DL-Methionine in the Performance and Carcass Characteristics of Broiler Chicks
محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 3، شماره: 4
سال انتشار: 1380
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 79
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شناسه ملی سند علمی:
JR_JASTMO-3-4_004
تاریخ نمایه سازی: 22 آبان 1402
چکیده مقاله:
An in vivo experiment was conducted to determine the effect of dietary betaine supplementation
(Betafin®) as a replacement for methionine on broiler performance and carcass
characteristics. In a completely randomized design (CRD) with five treatments of betaine
levels (at ۰, ۲۵, ۵۰, ۷۵, and ۱۰۰% in replacement for methionine) and five replicates of ۱۰
birds/replicate, two hundred fifty-day-old Ross broiler chicks were randomly distributed
in cages and fed the experimental diets from ۰ to ۴۹ days of age. Feed and water were
provided ad libitum. Feed intake and body weight were recorded weekly. At ۴۹ days of
age, one bird from each replicate was killed for comparison of carcass characteristics.
Betaine replacement for methionine had no effect on feed intake and feed to gain ratio but
decreased body weight gain at ۰ to ۳ (P<۰.۰۴۶۵) and ۰ to ۷ weeks of age (P<۰.۰۱). Betaine
as a replacement for methionine decreased the breast weight (P<۰.۰۲۵) and tended to reduce
the abdominal fat pad (۴۸.۹ vs ۴۰.۴ grams , ۱۰۰% methionine vs ۱۰۰% betaine replacement
for methionine). The present findings do not support the hypothesis that betaine
can effectively replace methionine.
کلیدواژه ها:
نویسندگان
H. Kermanshahi
Department of Animal Science, College of Agriculture, Ferdowsi University of Mashhad, P.O. Box: ۹۱۷۷۵-۱۱۶۳, Mashhad, Islamic Republic of Iran,