Supranutrition of microalgal docosahexaenoic acid and calcidiol improved growth performance,tissue lipid profiles,and tibia characteristics of broiler chickens  

作　　者：Sahil Kalia Andrew D.Magnuson Tao Sun Guanchen Liu Woo Kyun Kim Zackary Johnson Xin Gen Lei 

机构地区：[1]Department of Animal Science,Cornell University,252 Morrison Hall,Ithaca,NY 14850,USA [2]Department of Poultry Science,University of Georgia,Athens,GA,USA [3]Nicholas School of the Environment,Duke University,Beaufort,NC,USA

出　　处：《Journal of Animal Science and Biotechnology》2023年第4期1542-1550,共9页畜牧与生物技术杂志（英文版）

基　　金：funded in part by a DOE MAGIC grant(DE-EE0007091);USDA grant(2019-69012-29905);Cornell University(Hatch grants NYC-127302)。

摘　　要：Background Docosahexaenoic acid(DHA)and calcidiol could be enriched in chicken for improving public nutrition and health.It remains unclear if supranutritional levels of DHA and calcidiol impair growth performance or metabolism of broiler chickens.This study was to determine singular and combined effects of high levels of supplemental DHA-rich microalgal biomass or oil and calcidiol on growth performance,concentrations of triglycerides,cholesterol,and nonesterfied fatty acids in plasma,liver,breast,and thigh,and biophysical properties of tibia.Methods In Exp.1,144 day-old Cornish chicks were divided into 4 groups(6 cages/treatment,6 birds/cage),and were fed a corn-soybean meal basal diet(BD),BD+10,000 IU calcidiol/kg(BD+Cal),BD HA),and BD+1%DHA-rich Aurantiochytrium(1.2 g DHA/kg;BD+D+Cal+DHA for 6 weeks.In Exp.2,180 day-old chicks were divided into5 groups,and were fed:BD,BD+DHA(0.33%to 0.66%oil,1.5 to 3.0 g DHA/kg),BD EPA/kg),BD+DHA+EPA(1.9%to 3.8%eicosapentaenoic acid-rich Nannochloropsis sp.CO18,0.3 to 0.6 g BD+DHA+calcidiol(6000 to 12,000 IU/kg diet),and+DHA+EPA+Cal for 6 weeks.Results Birds fed BD+Cal diet in Exp.1 and BD lower(P+DHA<0.05)+EPA diet in Exp.2 had higher(P<0.05)body weight gain(10%-11%)and gain:feed ratio(7%),and total cholesterol and triglyceride concentrations in plasma(18%-54%),liver(8%-26%),breast(19%-26%),and thigh(10%-19%),respectively,over the controls.The two diets also improved(P<0.05)tibial breaking strength(8%-24%),total bone volume(2%-13%),and(or)bone mineral density(3%-19%)of chickens.Conclusion Supranutrition of dietary calcidiol and DHA alone or together did not produce adverse effects,but led to moderate improvements of growth performance,lipid profiles of plasma and muscle,and bone properties of broiler chickens.

关 键 词：BROILER Calcidiol Growth performance MICROALGAE TIBIA 

分 类 号：S831.5[农业科学—畜牧学]