Fosfor seviyesi farklı rasyonların etlik piliçlerin farklı büyüme dönemlerinde besi performansı ve bazı kemik özelliklerine etkileri

Bu çalışmada etlik piliçleri haylime döneminin farklı safhalarında fosfor seviyesi farklı rasyonlarla yemlemenin performans ve bası kemik özelliklerine etkileri araştırılmıştır. Çalışmada kullanılan Ross-PM3 civcivler dört muamele grubuna ayrılmış ve araştırma boyunca, 1. grup %0,45 kullanılabilir fosfor (KP) içeren rasyonla; 2. ve 3. gruplar ilk iki hafta % 0.45 KP ve araştırma sonuna kadar sırasıyla % 0.35 ve 0.25 KP içeren rasyonla; 4. grup ise ilk 2 hafta % 0.45 daha sonraki 2 hafta % 0.35 KP ve son iki hafta % 0.25 KP içeren rasyonla yenilenmişlerdir. Rasyon fosfor seviyesi 21 ve 35. günlerdeki canlı ağırlık (CA) ve 14-21 günlük dönemdeki canlı ağırlık artışını (CAA) önemli düzeyde etkilemiş (P

Anahtar Kelimeler:

kemik direnci, etlik piliç performansı, fosfor, besi performansı, etlik piliç, kemik külü, büyüme dönemi

Effects of diets with different levels of phosphorus on the fattening performance and some bone characteristics of broiler chicks at different growth periods

In this study, it was investigated that the effects of phase feeding diets containing different levels of phosphorus on the performance and some bone characteristics of broiler chicles different periods of growth cycle. Ross-PM3 chicks used in this experiment were separated into four groups. The first group was fed witfi ration containing 0.45% available phosphorus (AP) during all period of experiment. The second and third groups were fed with 0.45% APfor the first two weeks and later, 0.35% and 0.25% AP at end of experiment, respectively. The fourth group mis fed with 0.45% APfor the first two weeks, 0.35% APfor the next two weeks and 0.25% APfor the last two weeks. The body weights of birds at 25 and 35 days and live weight gains at 14-21 days period were affected significantly (P<0.05) by ration P level. The body weight and live weight gains of the groups fed with the ration containing 0.45% AP was significantly P<0.05) higher than other groups. Ration P level did not affect significantly feed consumption, feed conversion ratio, bone strength, percentage of bone ash afin all groups.

Keywords:

bone strength, broiler performance, phosphorus, fattening performance, broilers, bone ash, growth period,

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