SONGÜL ŞENTÜRKLÜ, Douglas LANDBLOM, Cheryl WACHENHEIM, Timothy PETRY

Using phosphorylated mannan oligosaccharide and fibrolytic enzyme as natural feed additive substitutes for growth-enhancing technologies in sustainable beef production

Bu çalışmanın amacı sürdürülebilir sığır eti üretiminde büyümeyi arttırıcı teknolojilere (GET) ikame olarak doğal yem katkı maddeleri (NFA) phosphorylated mannan oligosaccharide (Bio-MOS®-(MOS)) ve fibrolitik enzimin (Fibrozyme®-(FIB)) etkisini belirlemektir. 84 günlük büyütme ve bunu izleyen 122 günlük bitirme çalışmasında sütten kesilmiş Angus x Hereford x Gelbvieh melez kastre edilmiş tosunları (n=80; BW=279.6±3 kg) kullanılmıştır (4 grup; 4 tekrar/grup). GET içerikli (Revelor-IS® ve Rumensin®) kontrol (C) grubu NFA içerikli (10 mg/head/day): MOS, FIB ve MOS+FIB gruplar ile karşılaştırılmıştır. Veriler SAS istatistik programı kullanılarak analiz edilmiştir. Büyüme döneminde; C grubu tosunlarda son ağırlık, ağırlık artışı ve ortalama günlük artış (ADG) diğer MOS, FIB ve MOS+FIB gruplarına göre daha yüksektir (P

Sürdürülebilir sığır eti üretiminde büyümeyi artırıcı teknolojilere ikame olarak doğal yem katkı maddesi fosforile mannan oligosakkarit ve fibrolitik enzim kullanımı

The study objective was to determine the effect on beef production sustainability when growth-enhancing technologies (GET) were substituted with the natural feed additives (NFA) phosphorylated mannan oligosaccharide (Bio-MOS®-(MOS)) and fibrolytic enzyme (Fibrozyme®- (FIB)). Angus x Hereford x Gelbvieh steers, after weaning (n=80; BW=279.6±3 kg), were used in an 84-day backgrounding study (4 treatments; 4 pen replicates/treatment) that was followed by a 122-day finishing study. A control (C) treatment with GET (Revelor-IS® and Rumensin®) was compared to NFA (10 mg/head/day): MOS, FIB, and MOS+FIB. Data were analyzed using mixed procedure of SAS. The backgrounding C steers end weight, weight gain, and average daily gain (ADG) were greater (P<0.01) compared to MOS, FIB, and MOS+FIB. Feed efficiency ratio did not differ (P=0.198). Feed cost/kg of gain was lower for the C treatment (P<0.01). The C treatment net return was 45.9% greater than the average of MOS, FIB, and MOS+FIB treatments. For finishing, the C treatment ADG was greater (P<0.05) compared to MOS, FIB, and MOS+FIB. In addition, the C treatment harvest weight and hot carcass weight were greater (P<0.01) and were harvested 5 days earlier. However, other carcass measurements did not differ (P>0.10). Ending net return was $54.22, -$33.62, -$20.65, and -48.69 for the C, MOS, FIB, and MOS+FIB, respectively. The NFA were less profitable during backgrounding, but not profitable for finishing.

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