烟酰胺对肉仔鸡性能影响的研究

EFFECTOFDIETARYNIACINAMIDEONPERFORMANCESOFBROILERCHICKENS

用１日龄ＡｒｂｏｒＡｃｒｅｓ（ＡＡ）雏鸡３８４只（公母各半）进行试验，研究饲粮添加烟酰胺对肉仔鸡生长、血清生化指标、组织辅酶Ｉ（ＮＡＤ＋）含量及脂肪沉积的影响。试鸡按体重、性别随机分为４组，每组８个重复，各组分别喂以不添加烟酰胺的玉米豆粕型基础饲粮（前、后期分别含烟酸２２５和１９５ｍｇ／ｋｇ）和分别添加１５、３０、４５ｍｇ／ｋｇ烟酰胺的相同基础饲粮。试验分０～３和３～６周两个阶段，添加烟酰胺对鸡０～３与３～６周两阶段的日增重、日采食量、饲料转化效率（Ｆ／Ｇ）、胸肌脂肪含量、６周末鸡的血清总胆固醇、高密度脂蛋白胆固醇（ＨＤＬＣ）、低密度脂蛋白胆固醇（ＬＤＬＣ）及甘油三酯含量无影响（Ｐ＞０１０）。但影响了６周末鸡的肝脂率、腹脂率（Ｐ＜００６）及肌肉和肝脏中ＮＡＤ＋的含量（Ｐ＜０００４）。４５ｍｇ／ｋｇ烟酰胺添加组鸡的腹脂率明显低于其它各组（Ｐ＜００７）；３０和４５ｍｇ／ｋｇ组的肝脏脂肪含量显著低于其它两组（Ｐ＜００６）；随烟酰胺添加水平的提高，肝脏和肌肉中ＮＡＤ＋含量显著增加（Ｐ＜００１）。本次研究结果表明，添加３０和４５ｍｇ／ｋｇ的烟酰胺可降低肉仔鸡的脂肪沉积，影响机体的脂肪代谢。

Anexperimentwasconductedusingatotalof384(=11)dayoldArborAcresbroilerchickenstostudytheeffectsofniacinamideadditionongrowthperformance,someserumbiochemicalcharacters,NAD+contentsintissuesandfatdepositionChickenswererandomlyallotedbybodyweightandsexesto4groupswith8replicatesof12chickseachAbasalcornsoybeanmealdietcontaining225and195mg/kgniacinamideduring03and36weeksofagewasusedThedietaryniacinamideadditionallevelswere0,15,30and45mg/kgTheexperimentalperiodwasdividedinto2phasesof03and36weeksChicksweregivenafreechoiceaccesstodietsandtapwaterfor6weeksTheresultsshowedthatniacinamidesupplementhadnoeffectondailybodyweightgain,dailyfeedintake,feedefficiencyduring03and36weeksandserumtotalcholesterol(C),HDLC,LDLCandtriglyceridecontents(P>010)attheendof6weeksHoweverthereweresignificanteffectsonliverfatcontent,abdominalfatrate(P<006),muscleNAD+andliverNAD+contents(P<0003)Theabdominalfatcontentof45mg/kgadditiongroupwassignificantlylowerthantheothergroups(P<007)ThemuscleNAD+andliverNAD+contentsweresignificantlyincr