ملخص البحث :

The contribution of natural products as growth promoters as a major causative mechanism for limiting antibiotic growth promoter has been considered recently. It was found that this strategy contributed to the increase of the growth and development of poultry production , as a result, to an increase in the growth efficiency and reduction of the antibiotic as growth promoters. The aim of our study was to analyze whether the use natural growth promoters as antibiotic replacement can increase the broiler's growth. We analyzed the effect of probiotic, Spearmint leaves powder as replacement to Antibiotic in diet of broiler chicks on growth production. Total 240 female broiler chicks at one day old were housed ,designed into four experimental treatments with 3 replicated pens (20chicks per replicated pen) according to a completely randomized design. The experimental treatments were named G1: either basal feed only, G2: basal feed plus 2 % probiotic ( “Lactobacillus spp kkp 529/p® (“probiotic containing on Lactobacillus plantarum, 1.0 × 106 cfu/g”), G3: Basal feed plus 0.4 g/kg oxytetracycline, G4: basal feed plus Spearmint leaves powder 2g /kg feed for 6 weeks. There were no statistically significant differences between the treatments on the body weight (BW), final feed consumption(FI), final feed conversion ratio(FCR), and body weight gain(BWG). The ratio of dressings and the relative weight of some organs were not affected with all treatments, but the weight of the gizzard and the weight of Proventriculus in the Spearmint treatment were significantly increased (P< 0.05) compared with other treatments. In conclusion, the effect of probiotics and Spearmint powder in broiler’s feed were similar to antibiotic growth promoter effect, so that they could be significantly administrated as growth promoters

ملخص البحث :

This experiment was implemented to evaluate the influence of 3 plant extracts involving garlic (GC), cinnamon (CN), and black cumin (BC) powders in broiler chicken diet from 1-42 d on produc- tive, physiological, and immunological traits. In total, 240 birds were assigned into 4 groups, each with 3 replicates. In the control group (CO), the chickens were fed with a balanced diet. Experimental groups were composed by supplementing the diet with 4 mg/kg of diet for each GC, CN, and BC. At 3 and 6 weeks, GC, CN, and BC groups achieved higher body weights, weight gains (p≤0.01), and low feed conversion ratio. GC group recorded low feed intake (p≤0.05) compared to the CO and the other groups from 1 day–6 weeks. GC, CN, and BC groups registered high (p≤0.01) PCV value and lower cholesterol and triglycerides concentrations in serum compared to the CO group. Reduction and increase (p≤0.01) in serum glucose and protein for GC and CN, and CN and BC, respectively, were re- corded. High levels of triiodothyronine (T3) (p≤0.05) and thyroid-stimulating hormone (TSH) in GC and CN groups and all treated groups had high concentrations of thyroxine (T4) (p≤0.01) compared to the CO group. Moreover, a clear augmentation in serum antibody titer against Newcastle and Gumboro diseases in GC, CN, and BC compared with the CO group was observed. It was concluded that GC, CN, and BC extracts at the present level may be used to enhance the productive, physiologi- cal, and viral immunological characteristics of birds.

ملخص البحث :

TTheexperimentwasimplementedtoassesstheinfluenceofdietarysupplementationoflayingquailswithcreatinemonohydrate(CrM),L-carnitine(CAR)andtheirmixture(CrMCAR)asantioxidantsagainstoxidativestress(OS)inducedby2.5ppmleadacetate(LA)indrinkingwateronproductive,physio-logicalandmicrobialaspects.Intotal,400layingquailfemalesat10wkofageweredividedintoarandomizeddesignwith5groupsand4replicatesof20birdseach.Birdswerefedadlibitumwithabalanceddietfor8wk.Thecontrolgroupwaskeptunderno-stressconditionsandwasgivenfreshwaterwithoutanyadditives(G1).WhilebirdsinothergroupswereexposedtoOSinducedexperimentallyby2.5ppmLAindrinkingwaterwithnofeedadditive(G2)orsupplementedwith500mg/kgCrM(G3)or500mg/kgCAR(G4)orcombinationof250mg/kgeachofCrMandCAR(CrMCAR,G5)tofeedmixture.ComparedtoG2,G5demonstratedthereduction(P≤0.05)offeedconversionratio,feedintake,mortalityandilealtotalcoliform,aswellasserumandeggmalondialdehydeandserumlipidhydroperoxide,uricacid,glucose,cholesterol,enzymaticactivities(alanineaminotransferase,aspartatetransaminase,alkalinephosphatase,creatinephosphokinase,g-glutamyltransferase),andheterophils/lymphocytesratio.Inthemeanwhile,therewasanincrease(P≤0.05)ineggpro-duction,eggmass,andweightwiththeimprovementofeggquality,serumsexhormoneslevelandileallacticacidbacteriaforG5followedbyG4andG3.Moreover,G5enhanced(P≤0.05),thetotalantioxidantcapacityofeggandserumglutathione,superoxidedismutase,catalase,glutathioneperoxidase,proteinandcalciumlevels.Therefore,dietaryCrMCAR,CARandCrMhaveanalogousinfluencetocontrolbyimprovingtheantioxidantandphysiologicalparameterswhichresultedinbetterproductiveperformanceandeggcharacteristicsofstressedquails.Theseantioxidants,especiallyintheirequalcombination,arebeneficialtoalleviateoxidativestressincidenceandcanberecom-mendedforpoultryfeedingundervariousaspectsofenvironmentalstresses

ملخص البحث :

TTheexperimentwasimplementedtoassesstheinfluenceofdietarysupplementationoflayingquailswithcreatinemonohydrate(CrM),L-carnitine(CAR)andtheirmixture(CrMCAR)asantioxidantsagainstoxidativestress(OS)inducedby2.5ppmleadacetate(LA)indrinkingwateronproductive,physio-logicalandmicrobialaspects.Intotal,400layingquailfemalesat10wkofageweredividedintoarandomizeddesignwith5groupsand4replicatesof20birdseach.Birdswerefedadlibitumwithabalanceddietfor8wk.Thecontrolgroupwaskeptunderno-stressconditionsandwasgivenfreshwaterwithoutanyadditives(G1).WhilebirdsinothergroupswereexposedtoOSinducedexperimentallyby2.5ppmLAindrinkingwaterwithnofeedadditive(G2)orsupplementedwith500mg/kgCrM(G3)or500mg/kgCAR(G4)orcombinationof250mg/kgeachofCrMandCAR(CrMCAR,G5)tofeedmixture.ComparedtoG2,G5demonstratedthereduction(P≤0.05)offeedconversionratio,feedintake,mortalityandilealtotalcoliform,aswellasserumandeggmalondialdehydeandserumlipidhydroperoxide,uricacid,glucose,cholesterol,enzymaticactivities(alanineaminotransferase,aspartatetransaminase,alkalinephosphatase,creatinephosphokinase,g-glutamyltransferase),andheterophils/lymphocytesratio.Inthemeanwhile,therewasanincrease(P≤0.05)ineggpro-duction,eggmass,andweightwiththeimprovementofeggquality,serumsexhormoneslevelandileallacticacidbacteriaforG5followedbyG4andG3.Moreover,G5enhanced(P≤0.05),thetotalantioxidantcapacityofeggandserumglutathione,superoxidedismutase,catalase,glutathioneperoxidase,proteinandcalciumlevels.Therefore,dietaryCrMCAR,CARandCrMhaveanalogousinfluencetocontrolbyimprovingtheantioxidantandphysiologicalparameterswhichresultedinbetterproductiveperformanceandeggcharacteristicsofstressedquails.Theseantioxidants,especiallyintheirequalcombination,arebeneficialtoalleviateoxidativestressincidenceandcanberecom-mendedforpoultryfeedingundervariousaspectsofenvironmentalstresses