3322

3186

كارشناسي ارشد

﴿علوم دامي ﴾

اصفهان: دانشگاه صنعتي اصفهان ، دانشكده كشاورزي

1385

ده ، 88 ، [ II ] ، ص . : مصور ، جدول ، نمودار ، عكس

ص ، ع ، به فارسي و انگليسي

جواد پور رضا ، حميدرضا رحماني

عبدالحسين سميع ، مهدي محمد علي پور

مسعودعليخاني ، جواد كرامت

مهندسي كشاورزي

ID3186

به فارسي و انگليسي : قابل رؤيت در نسخه ديجيتالي

93Abstract As research in the area of nutritional modulation of immune function has increased it isbecoming apparent that nutrient needs for immunity do not coincide with those forgrowth or skeletal tissue accretion In this view an experiment was designed that 1134broilers received supplemental Zn Met and betaine with or without feed restriction tocheck their effects on humoral immunity and increasing resistance in Eimeria infection Chickens consumed food ad libitum or was restricted on alternate days from 11 to 18dof age Supplemental Zn Met were 0 40 or 60 ppm and basal diet contained 74 ppmzinc 0 0 6 and 1 2 kg ton betaine were added to diets Antibody response to SRBCwere determined on d 21 At 28 d of age the chicks were inoculated via the drinkingwater with a mixed culture of two Eimeria species to simulate a coccidiosis challenge Ilieum and cecum content were measured for osmolarity at 21 and 42 d of age Zn Metcould not elevate any performance factors but betaine and feed restriction decreasedfeed convertion ratio Supplemented diets with 1 2 kg ton betaine improved averagedaily gain at 21 to 42 d period Antibody response to SRBC increased by 40 ppm ofZn met p 0 05 and feed restriction p 0 01 Variations in osmolarity of ileum andcecum content were similar and they decreased by 1 2 betaine level and feed restrictionsignificantly Sera IgA levels increased with coccidio infection and its amount either insera and gut tissue increased by increasing level of Zn Met and betaine in diet p 0 01 Farther more feed restriction increased IgA level significantly

جواد پور رضا ، حميدرضا رحماني

عبدالحسين سميع ، مهدي محمد علي پور

مسعودعليخاني ، جواد كرامت