کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2072710 1544721 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Egg laying characteristics, egg weight, embryo development, hatching weight and post-hatch growth in relation to oviposition time of broiler breeders
ترجمه فارسی عنوان
ویژگی های تخمگذار تخم مرغ، وزن تخم مرغ، رشد جنین، وزن تخم مرغی و رشد پس از آن در ارتباط با زمان تخم گذاری جوجه های گوشتی
کلمات کلیدی
تخمک گذاری، پرورش دهندگان جوجه های گوشتی، خصوصیات تخمگذار تخم مرغ انکوباسیون، رشد پس از انفجار
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی

Two experiments were conducted to determine egg laying characteristics and the effects of oviposition time on egg weight, embryo development and post-hatch growth in broiler breeders. In experiment 1, eggs collected for 3 consecutive days on hourly basis between 06:30 and 17:30 h were categorized to early, middle and late oviposition times in the clutch. In experiment 2, eggs were incubated to study embryo development, remaining albumen, liver weight, heart weight and the tibia length of embryos at 12, 14, 16 and 18 days of incubation as well as the body weight of hatchlings and chickens at 7, 21 and 42 days of age in relation to oviposition time. About 76% of nest eggs were laid from 06:30 to 11:30 h. A similar pattern was observed in floor eggs. Egg weight decreased (P < 0.01) with advanced position in the clutch. Generally, oviposition time had no effect on embryo growth parameters. At hatch, body weight of chicks derived from eggs of late oviposition times was less (P < 0.01) than that of chicks from eggs produced earlier in the clutch. From 3-week-old onwards, chickens of early oviposition time sustained heavier (P < 0.05) weight than chickens of middle oviposition time whereas chickens of late oviposition time obtained a middle weight. Differences in egg weights, body weight at hatch and post-hatch growth due to time of oviposition suggest that oviposition time together with incubation conditions should be considered for obtaining greater uniformity and growth of chickens.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 156, May 2015, Pages 103–110
نویسندگان
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