Effect of different levels of amino acid and vitamins instarter period of broilers on performance and antibodytiter production

Journal of Livestock Science

article

Rashidi H.¹  Gheisari A.² 

[1] Department of Animal Science, Islamic Azad University, Isfahan ,(Khorasgan), Branch;Isfahan Agricultural and Natural Resources Research and Education Center

关键词: Broiler;    Performance;    Amino acid;    Vitamin;    Immunity;   

DOI  :  10.33259/JLivestSci.2019.126-131

学科分类：农业科学（综合）

来源: Journal of Livestock Science

【 摘 要 】

This study was conducted to evaluate the effect of vitamin and amino acid levels in starter period on growthperformance and immune responses of broilers. A total of 585 one-day-old broilers (Ross 308) were randomlyassigned to nine experimental diets, each diet had five replicates of thirteen broilers. Daily feed intake, body weight,and daily weight gain were not significantly affected by amino acid and vitamin levels in each rearing period(P˃0.05). In overall rearing period the lowest feed conversion ratio was obtained by 85% vitamin level (P˂0.05).Also, the significant effect was observed between interaction effect of amino acid and vitamin levels (P<0.05). Theantibody titer against Newcastle Disease and Avian Influenza Viruses were not significantly affected by amino acidand vitamin levels (P˃0.05). Although, in starter period performance indices by 85% amino acid and vitamin levelswere insignificantly higher than other levels. In grower period, performance indices were insignificantly increasedby 115% amino acid level and 85% vitamin level (P˃0.05). The 100% amino acid and 85% vitamin level in finisherperiod insignificantly increased performance indices (P˃0.05). In overall rearing period, performance indices wereimproved by 100% amino acid and 85% vitamin level (P˃0.0%). These results indicated that performance indiceswas improved by 100% amino acid and 85% vitamin level (P˃0.05), but immune responses were not significantlyaffected by amino acids and vitamin levels (P˃0.05).

【 授权许可】

Unknown