Hüseyin ESECELİ, Tanay BİLAL, İsmail ABAŞ

The effect of organic acid, zeolite, or their combination on performance, some serum indices, and ileum pH values in broilers fed with diff erent phosphorus levels

Bu çalışma; organik asit (OA), zeolit ve her ikisinin birlikte düşük ve yeterli düzeyde fosfor (P) içeren mikrobiyal fi taz katkılı rasyona ilavesinin broyler performansı, bazı serum parametreleri ve ileum pH değeri üzerine etkilerini araştırmak için yapılmıştır. 480 adet günlük broyler civcivler eşit olarak sekiz gruba bölünmüştür. 600 FTU fitaz enzimi içeren bazal rasyon başlangıç ve büyütme dönemleri için ayrı olarak hazırlanmıştır. Deneme grupları düşük P [(% 0,39 P; bazal rasyon (B), B+OA, B+ZE ve B+OA+ZE)] ve yeterli P [(% 0,70 P; bazal rasyon (B), B+OA, B+ZE and B+OA+ZE)] düzeyi ile beslenen iki ana gruba ayrılmıştır. Düşük-P grubunun ortalama canlı ağırlığı yeterli-P grubundan önemli derecede düşük bulunmuştur. Ayrıca ZE ve OA+ZE ilavesi canlı ağırlıkta artışa neden olmuştur. Çalışmanın 0-21. günleri arasında ZE ve OA+ZE ilavesi yem tüketimini önemli derecede azaltmış ve rasyonun P düzeyi ile OA+ZE ilavesine bağlı olarak yemden yararlanma oranı iyileşmiştir. Denemenin 21. gününde rasyonun P düzeyindeki azalmaya bağlı olarak serum P düzeyi artmış, 42. gündeki ALP konsantrasyonu ise OA+ZE ilavesi yapılan grupta önemli derecede düşük bulunmuştur. OA grubunun ileum pH değerinin 42. günde diğer gruplardan daha düşük olduğu tespit edilmiştir. Sonuçlar düşük ve yeterli düzeyde P içeren mikrobiyal fitaz katkılı rasyonlara ZE ve OA+ZE kombinasyonunun ilavesinin performans üzerine olumlu etki yarattığını göstermiştir.

Farklı fosfor düzeyi içeren broyler rasyonlarına organik asit, zeolit veya kombinasyonları ilavesinin performans, bazı serum parametreleri ile ileum pH değerlerine etkisi

The aim of this study was to investigate the effects of the addition of organic acid (OA), zeolite (ZE), or both to broiler diets with microbial phytase containing low and adequate levels of phosphorus (P) on performance, some serum indices, and ileum pH values. For the study, 480 broiler chicks 1-day old were assigned equally to 8 groups, with 6 replicates (10 chicks per replicate) carried out over 42 days. A basal diet containing 600 FTU of phytase enzyme was formulated separately for the starter and grower periods. Experimental groups were divided into 2 main groups: low P [(0.39% P; basal diet (B), B+OA, B+ZE, and B+OA+ZE)] and adequate P [(0.70% P; basal diet (B), B+OA, B+ZE, and B+OA+ZE)]. The average body weight of the low-P groups was signifi cantly lower than that of the adequate-P groups. However, birds fed ZE and OA+ZE had increased body weights. Within the first 21 days of the study, the addition of ZE and OA+ZE to diets signifi cantly decreased feed intake, and feed conversion rates improved depending on the P level and the OA+ZE addition. Serum P levels increased depending on the decrease in the level of P in the diet at 21 days, and the ALP concentration at day 42 was found to be statistically lower in the group fed an OA+ZE diet. Ileum pH values in the OA group were found to be lower than those in other groups at 42 days. These results proved that the addition of ZE and OA+ZE to the diet with microbial phytase containing low and adequate levels of P had positive effects on performance.

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