The effect of post-weaning steer diets supplemented with field pea,flaxseed and a field pea-flaxseed combination on feedlot finishing performance,carcass quality and immune response [Sütten kesilmiş dana rasyonlari{dotless}na İlave edilen keten tohumu,yemlik bezelye ve keten tohumu-yemlik bezelye kombinasyonunun besi sonu performansi{dotless},karkas kalitesi ve baǧi{dotless}şi{dotless}kli{dotless}k sistemi üzerine etkisi]

This study objective was to compare the effect of feeding field pea,flaxseed and field pea-flaxseed combination on steer performance and immune response during the 50-d post-weaning period (pwp). subsequently,the effect on feedlot finishing performance,immune response and carcass quality were determined. crossbred angus x hereford x gelbvieh steers (castrated male calves,age=7.4 month,n=173) were used in the 3 year replicated study. the four pelleted 50-d pwp diets (pwd) were: 1) control (c),2) 12.5% flaxseed (flx),3) 20.0% field pea (p),and 4) 20.0% field pea + 12.5% flaxseed (pflx). in the pwp,average daily weight gain (adg) was increased (p<0.05) for flx and pflx when compared with c and p,but feed cost/kg of gain for flx and pflx was decreased (p<0.05). in the feedlot period,initial weight,slaughter weight,fattening period,weight gain,adg,average daily feed intake and feed conversion ratio was not significantly different among the diets (p>0.10). for carcasses,pwd did not affect hot carcass weight,marbling score,percent us department of agriculture quality grade (p>0.05); however,flx treatment reduced rib-eye area (rea),while p treatment increased rea (p<0.05). flx and pflx treatments did not increase serum neutralization titer level and did not reduce morbidity (p=0.96) and health care cost (p>0.10). overall,flaxseed improved 50-d pwp performance,but pwds had no carryover effect on feedlot finishing period net return.