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Register a new userتأثير وقت جمع البيض في بعض المؤشرات الفيزيولوجية في أمات انتاج اللحم
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Damascus University رسالة ماجستير
Publication date
2015
fields
Agricultural Engineering
and research's language is
العربية
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نفذ البحث في أربع تجارب هدفت لتحديد نموذج وضع البيض الموضوع في الأعشاش والبيض الأرضي وتأثير وقت جمع البيض في وزن البيض
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زكريا ع ح 1991 فيزيولوجيا الدواجن ( الجزء النظري) جامعة دمشق
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Three experiments were conducted using Cobb 500 broiler breeders to determine oviposition pattern and the effect of oviposition time of eggs representing different positions in the normal egg laying sequence on egg weight , fertility , hatchability , embryonic mortality and chicken weight at hatch.
Aiming to develop the growth, to decrease antibiotic and increase
immunity of poultry, propolis and garlic powder was used in
feeding of broiler chicken by adding it in the form of dry powder .
The research was carried out on Hubberd hybrid which they are
locally existed. Birds were divided into four groups (control and
three experiment groups).
Two experiments were carried out to determine the effect of flock
age on egg laying pattern, floor laying, egg weight, hatchability,
fertility and body weight at hatch. Eggs were collected from 32and
43 wk old Cobb 500 broiler flocks for 6 consecu
tive days hourly to
study egg laying pattern and floor laying (experiment 1). In
experiment 2, 2916 eggs from the flock at 32 ,43 and 49 wk old
were used to determine the effect of flock age on egg weight,
hatchability, fertility and body weight at hatch.
Two experiments were conducted to evaluate the effect of ascorbic acid
(AA) during egg incubation on development of broiler chickens of a
commercial stock. In Experiment ١, eggs with living embryos were injected at
١٥ d of incubation with ٠٫١ ml o
f saline solution containing either ٣ or ١٢ mg of
AA per egg and uninjected control. Body weights of each treatment were
determined weekly from hatch to ٦ wk of age. In Experiment ٢, the treatments
at ١٥ d of incubation were as follows: ١) eggs injected with ٣ mg of AA and
then cooled at ٢٢° C for ٢٤ h; ٢) eggs dipped in ٣٪ solution of AA for ٣ min
and then cooled at ٢٢° C for ٢٤ h; and ٣) control. Embryo weight at ١٩ d of
incubation, hatchability and body weights of the hatched chicks were
determined.
The research was conducted on some olive
varieties known as Alsourani- Aldan- Mahazm Abu Satel- Alglet-
Alnepali, in the aim of comparing their tolerance against the stress
of salinity (sodium chloride) through some morphological and
physiological traits. Different concentrations of salt as well as to
the control (fresh water) were used in this experiment.
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