SONGÜL ŞENTÜRKLÜ, Douglas LANDBLOM

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

Bu çalışmanın amacı, 50 gün boyunca sütten kesim sonrası periyot (PWP)ta rasyona ilave edilen keten tohumu, yemlik bezelye ve keten tohumu- yemlik bezelye kombinasyonun danaların besi performansı ve bağışklık sistemi üzerine etkisini karşılaştırmaktır. Bunu takiben, besi sonu performansıkarkas kalitesi ve bağışılık sistemi üzerine etkisini belirlemektir. Üç yıl tekrarlanan bu çalışmada melez Angus x Hereford x Gelbvieh danalarkısırlaştırılmış erkek dana, yaş=7.4 ay, n=173) kullanılmıştır. 50 günlük PWP rasyonları (PWD); 1) Kontrol (C), 2) %12.5 Keten tohumu (FLX), 3) %20.0 yemlik bezelye (P) ve 4) %20 yemlik bezelye + %12.5 keten tohumu (PFLX) olarak dört grupta peletlenmiştir. PWPda FLX ve PFLX gruplarında günlük canlı ağırlık artışı (ADG) daha yüksek (P0.05); bununla birlikte, P grubunda sırt kası alanı (REA) artarken, FLX grubunda REA azalmıştır (P0.10) önemli ölçüde düşmemiştirGenel olarak, keten tohumu 50-d PWP performansını artırmıştır, ancak PWDnin daha sonraki besi bitirme peryodunda net kâr üzerine herhangietkisi olmamıştır.

Sütten Kesilmiş Dana Rasyonlarına İlave Edilen Keten Tohumu, Yemlik Bezelye ve Keten Tohumu-Yemlik Bezelye Kombinasyonunun Besi Sonu Performansı, Karkas Kalitesi ve Bağışıklık Sistemi Üzerine Etkisi

This study objective was to compare the effect of feeding field pea, flaxseed and field pea-flaxseed combination on steer performanceimmune response during the 50-d post-weaning period (PWP). Subsequently, the effect on feedlot finishing performance, immune responsecarcass quality were determined. Crossbred Angus x Hereford x Gelbvieh steers (castrated male calves, age=7.4 month, n=173) were used in theyear 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,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.

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