MUSTAFA MİDİLLİ, Mustafa SALMAN, Ömer Hakan MUĞLALI, SENA ÇENESİZ, Neslihan ORMANCI, MURAT PAKDİL, İ. Safa GÜRCAN

The Effects of Different Zinc Sources and Microbial Phytase Supplementation on the Tibial Bone Properties, Strength and Zn Mineralization Broilers Fed with Diet Low Phosphorus [1]

Bu araştırma, düşük yararlanılabilir fosfor (Py) içeren mısır-soya temeline dayanan diyetlere farklı çinko kaynakları ile mikrobiyal fitaz ilavesinin broylerlerde tibia morfometrik indeksler, kemik direnci ve çinko birikimi üzerine etkisini değerlendirmek amacıyla yapılmıştır. Araştırma kırk iki gün sürmüştür. Toplam 875 adet günlük Ross 308 civciv, yedi farklı deneme grupları ve her grup 25 adet erkek hayvan içeren beş alt gruptan oluşturulmuştur. Pozitif kontrol grubu, çinko içermeyen mineral ön karması ve yeterli miktarda yararlanılabilir fosfor (%0.45) içeren rasyonla beslenmiştir. Negatif kontrol grubu ise, çinko içermeyen mineral ön karması ve düşük fosfor (%0.30) içeren temel bir rasyonla beslenmiştir. Deneme grupları; Fitaz, organik çinko, inorganik çinko, organik çinko + fitaz ve inorganik çinko + fitaz rasyonlarına sırasıyla %0.30 Py ve 500 FTU fitaz/kg; %0.30 Py ve 75 mg/kg Zn-proteinat; %0.30 aP ve 75 mg/kg ZnSO4; 75 mg/kg Zn-proteinat ve 500 FTU fitaz/kg; 75 mg/kg ZnSO4 ve 500 FTU fitaz/kg katılmıştır. Tibiotarsal diafiz çapı, medial duvar kalınlığı, tibiotarsal indeksi, medullar kanal çapı, esnekliği ve kırılma direnci bakımından gruplar arasında bir farklılık bulunmamıştır. Bununla beraber, OZ + PH and IZ + PH rasyon grubuna ait tibiotarsal ağırlık, tibiotarsal ağırlık/uzunluk indeksi değerleri her iki kontrol grubundan önemli düzeyde farklılık (P

Değişik Çinko Kaynakları ve Mikrobial Fitaz Katkısının Düşük Düzeyde Fosfor İçeren Etlik Piliçlerin Tibia Kemik Özellikleri, Dayanıklılığı ve Çinko Mineralizasyonu Üzerine Etkileri

This experiment was conducted to evaluate the effects of different Zn sources and microbial phytase supplemented to low available P (aP) corn-soy diets on morphometric indices of tibiotarsi, bone strength and Zn accumulation. The experimental period lasted 42 days. A total of 875 one-day-old Ross 308 male broiler chicks were randomly assigned to seven treatment groups (positive, negative and five experimental), each with five identical subgroups of 25 birds. The positive control (PC) group was fed a diet containing adequate concentration (0.45%) of available phosphorus (aP) due to mineral premix (except zinc) and feeds; the negative control (NC) group was fed a basal diet including low concentration (0.30%) of available phosphorus (aP) due to mineral premix (except zinc) and feeds; 0.30% aP and 500 FTU phytase kg-1; 0.30% aP and 75 mg Zn-proteinate kg-1; 0.30% aP and 75 mg ZnSO4 kg-1; 75 mg Zn-proteinate and 500 FTU phytase kg-1; 75 mg ZnSO4 and 500 FTU phytase kg-1 were added to the experimental groups of phytase (PH), organic zinc (OZ), inorganic zinc (IZ), organic zinc + phytase (OZ+PH) and inorganic zinc + phytase (IZ+PH) respectively. There were no significant differences among the groups in mean tibiotarsal diaphysis diameter, thickness of the medial wall, tibiotarsal index, medullary canal diameter, modulus of elasticity or breaking stress. However, diet with OZ + PH and IZ + PH supplementation had a greater influence on tibiotarsal weight and tibiotarsal weight/length index when compared to those measurements in broilers in both control groups (P<0.001). In addition, feed additives were seen to have a significant effect on tibiotarsal length (P<0.01), robusticity index (P<0.001), thickness of the lateral wall (P<0.05) and Zn content (P<0.05). In conclusion, the study indicated that the use of organic and inorganic Zn alone or in combination with microbial phytase improved tibial bone traits and Zn content.

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