Yeme katılan fitaz enziminin broylerlerde besi performansı ve mineral dengesi üzerine etkisi
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Tarih
2003
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info:eu-repo/semantics/openAccess
Özet
Bu araştırma, mısır-soya temeline dayalı rasyonlara, mikrobiyal fitaz enziminin çeşitli düzeylerde katılmasının, broylerlerde besi performansı, karkas randımanı ve kemik mineral düzeyleri üzerine etkisini incelemek amacıyla yürütüldü. Araştırmada 2000 adet günlük Ross 308 broyler civciv kullanıldı. Araştırma her biri 400 adet civcivden oluşan 2 kontrol, 3 deneme olmak üzere 5 grup halinde yürütüldü. Her grup 100'er civcivden oluşan dört tekrar grubuna ayrıldı. Kontrol gruplarından birinin yemlerine günlük gereksinmeler dikkate alınarak inorganik fosfor kaynağı katılırken, diğerinin (negatif kontrol) yemlerine katılmadı. Kontrol gruplarının yemlerine deneme boyunca fitaz enzimi katkısı yapılmadı. Deneme gruplarının (111., IV., ve V.) rasyonlarına mikrobiyal fitaz enzimi olarak Phytase Novo CT sırasıyla 120 g/ton, 200 g/ton ve 280 g/ton (300 U/kg , 500 U/kg ve 700 U/kg) düzeylerinde ilave edildi. Araştırmada kullanılan hayvanlar ilk 10 gün etlik civciv başlangıç yemi, 10-20. günler arası etlik civciv yemi, 20-30. günler arası etlik piliç yemi ve 30-42. günler arası etlik piliç bitirme yemi ile beslendi. Araştırma 42 gün sürdü. Araştırma süresince canlı ağırlık, canlı ağırlık artışı, yem tüketimi ve yemden yararlanma oranları bütün gruplarda haftalık olarak belirlendi. Deneme sonunda her gruptan sekiz erkek ve sekiz dişiden oluşan 16 adet piliç kesilerek sıcak karkas ağırlığı, karkas randımanı, serum inorganik fosfor ve tibia külü tesbit edildi.Araştırma sonunda broyler yemlerine katılan mikrobiyal fitaz enziminin canlı ağırlık (P < 0,001) ve yemden yararlanma oranları (P < 0,001) üzerine etkisinin kontrol grubuna göre önemli ölçüde olumlu olduğu, deneme gruplarında yem tüketimi (P < 0,01, P < 0,001), tibia külü kalsiyum, fosfor ve magnezyum miktarının yükseldiği (P < 0,001), karkas randımanlarının daha yüksek olduğu (P < 0,001) serum fosfor konsantrasyonunun matematiksel olarak artış gösterdiği saptandı. Sonuç olarak, farklı düzeylerde yemlere katılan mikrobiyal fitazın broylerlerde besi performansı ve karkas randımanı üzerine en etkili seviyenin 500 U/kg miktarında olduğu kanısına varılmıştır.
This study was carried out to determine the effect of the supplementation of microbial phytase in broiler feeds based on corn and soybean meal, to investigate its effect on broiler performance, dressing percentage and bone mineralization. In this experiment, 2000 1-day-old Ross 308 broiler chicks were used in five groups, each consisting of 400 chicks. Two of the groups were chosen as control groups (positive and negative), and the others were used as experimental groups. Each treatment group was divided into four replicates of 100 chicks. The first control group was fed a diet containing inorganic phosphorous but not phytase; the second control group was fed no inorganic phosphorous and phytase; and the third, fourth and fifth experimental groups were given Phytase Novo CT as an phytase enzyme throughout the experiment at the levels of 120 g/t, 200 g/t and 280 g/t (300 U/kg, 500 U/kg and 700 U/kg), respectively. The chicks were fed a broiler pre-starter diet for the first 10 days, broiler starter diet between days 10 and 20, broiler grower diet between days 20 and 30, and broiler finisher diet between days 30 and 42. The experimental period lasted 42 days. The body weight, live weight gain, feed consumption and feed conversion ratio of all the groups were determined every week during the experiment. Eight male and eight female chickens were slaughtered at the end of the experiment from each group. The weights and percentages of hot carcass, plasma inorganic phosphorus and tibia ash were determined. At the end of the experiment, the addition of microbial phytase to the diet significantly increased body weight (P < 0.001) and feed consumption (P < 0.01, P < 0.001) and improved the feed conversion ratio (P < 0.001). Hot carcass percentage was significantly increased (P < 0.001) by dietary phytase. In addition, there was an increase in tibia Ca, P and Mg (P < 0.001). All microbial phytases increased plasma inorganic phosphorus, though the differences were not statistically significant. In conclusion, the addition of 500 U/kg of microbial phytase at different levels led to the best fattening performance and carcass percentage in broilers.
This study was carried out to determine the effect of the supplementation of microbial phytase in broiler feeds based on corn and soybean meal, to investigate its effect on broiler performance, dressing percentage and bone mineralization. In this experiment, 2000 1-day-old Ross 308 broiler chicks were used in five groups, each consisting of 400 chicks. Two of the groups were chosen as control groups (positive and negative), and the others were used as experimental groups. Each treatment group was divided into four replicates of 100 chicks. The first control group was fed a diet containing inorganic phosphorous but not phytase; the second control group was fed no inorganic phosphorous and phytase; and the third, fourth and fifth experimental groups were given Phytase Novo CT as an phytase enzyme throughout the experiment at the levels of 120 g/t, 200 g/t and 280 g/t (300 U/kg, 500 U/kg and 700 U/kg), respectively. The chicks were fed a broiler pre-starter diet for the first 10 days, broiler starter diet between days 10 and 20, broiler grower diet between days 20 and 30, and broiler finisher diet between days 30 and 42. The experimental period lasted 42 days. The body weight, live weight gain, feed consumption and feed conversion ratio of all the groups were determined every week during the experiment. Eight male and eight female chickens were slaughtered at the end of the experiment from each group. The weights and percentages of hot carcass, plasma inorganic phosphorus and tibia ash were determined. At the end of the experiment, the addition of microbial phytase to the diet significantly increased body weight (P < 0.001) and feed consumption (P < 0.01, P < 0.001) and improved the feed conversion ratio (P < 0.001). Hot carcass percentage was significantly increased (P < 0.001) by dietary phytase. In addition, there was an increase in tibia Ca, P and Mg (P < 0.001). All microbial phytases increased plasma inorganic phosphorus, though the differences were not statistically significant. In conclusion, the addition of 500 U/kg of microbial phytase at different levels led to the best fattening performance and carcass percentage in broilers.
Açıklama
Anahtar Kelimeler
Broyler, Besi Performansı, Fitaz, Fosfor, Kalsiyum, Magnezyum, Broiler, Fattening Performance, Phytase, Phosphorus, Calcium, Magnesium
Kaynak
Turkish Journal of Veterinary and Animal Sciences
WoS Q Değeri
Scopus Q Değeri
Q3
Cilt
27
Sayı
3
