Influence of Lighting Regime on Developing Layers Pullets within an Open - Sided Housing System in the Sudan

الموضوعات

علوم بحتة وطبيعية

الملخص

This study was aimed to investigate the capabilities of four applicablelighting regimes in inducing the onset of correct sexual maturity ofdeveloper layer pullets. The applied lighting regimes include natural daylight (NDΩ 12 hrs light), continuous lighting regime (CLR Ω 24 hrs light),boosted natural day length (BND Ω 16 HL: 8 HD) and 2-stages lightingregimes (2-SLR Ω 12 HL: 4 HD: 8 HL). The four lighting regime and 64grower layer pullets were randomly and evenly distributed to 16 similarexperimental pens within an open – type poultry house. The experimentalpens were equipped with all required facilities and prepared with an aid ofblack curtains to keep them light-tight.The experiment was commenced when the grower pullets were 10weeks old and continued for a week post the onset of laying. During thisperiod the experimental birds were kept restricted to the planned lightingregimes, got accessible to water and feed and vaccinated against theendemic diseases (New-Castle, Infectious Bronchitis and Fowl Pox).Data collected include: age, body weight, egg size and feed intake at pointof lay and a week after in addition to mortality rate throughout theexperimental period. The collected data were statistically analyzed to comeup with the following results: The developer pullets reflected at point of layshowed significantly (P< 0.05) controversial responses towards theexamined lighting regimes; The flock developed under CLR demonstratedthe youngest age at point of lay (131 days), the highest rates of feed intakeand body weight gain in addition to the smallest first egg size; The flockexposed to the ND responded significantly (P< 0.05) in a complete oppositemanner to that of the former group under CLR. In contrast to the responsepatterns of the former two flocks (CLR and ND), the interaction trends andmagnitude of the flocks confined to either the BND (16 hrs light) or the 2-SLR (20 hrs light) were moderate.With the exception of feed intake of the ND group, no other apparentchanges in performance pattern of the studied flocks were observed througha week post the onset of production. Further studies are stronglyrecommended for displaying the complete production features of eachexperimental lighting regime.

روابط وملفات

التعريف والنوع

رقم الوثيقة

fccd9657-cdc0-444a-b9ca-e248c7389d3a

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1639521_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Abbaker Ali Idris","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Kamal Elddin Gafer Elbashier Aboush ","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Influence of Lighting Regime on Developing Layers Pullets within an Open - Sided Housing System in the Sudan

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Abbaker Ali Idris

الإعداد

Kamal Elddin Gafer Elbashier Aboush

الاقتباسات الببليوغرافية