Researches on The Responses Of Different Hybrid Layers With Respect To Egg Production and Quality Performances To Forced Molting Programs With and Without Feed Withdrawal

Authors : Ali AYGÜN, Ramazan YETIŞIR

Pages : 112-121

View : 15 | Download : 17

Publication Date : 2008-08-25

Article Type : Research Paper

Abstract :This research was carried out to determine the effects of four forced molting programs including three non-feed withdrawal programs insert ignore into journalissuearticles values(BB: barley based, WB: wheat bran based and OB: oat based); which supplied with alfalfa meal and one feed withdrawal method insert ignore into journalissuearticles values(FW: control 8 d FW+34 d resting diet); on egg production and egg quality performances of 320 brown insert ignore into journalissuearticles values(H&N Brown Nick); and 320 white insert ignore into journalissuearticles values(Hy-Line W-36); hybrid layers at 57 week of age. The experiment lasted totally 46 wk including for a 6 wk molting period followed by a 40 wk post molt production period. According to the results obtained; the genotype had significant insert ignore into journalissuearticles values(P<0.05); effect on body weight loss, feed consumption, hen day egg production insert ignore into journalissuearticles values(number, %);, cracked egg insert ignore into journalissuearticles values(%); and heterophil:lymphocyte insert ignore into journalissuearticles values(H:L); ratio insert ignore into journalissuearticles values(P<0.01); in molting period. Molting methods had significant insert ignore into journalissuearticles values(P<0.01); effects on body weight loss, feed consumption, hen-day egg production insert ignore into journalissuearticles values(number, %);, pancreas weight ratio in molting period. In the production period; BB group had lower insert ignore into journalissuearticles values(P<0.05); hen-day egg production insert ignore into journalissuearticles values(%); than those of OB and FW groups. Feed efficiency values of WB group were better insert ignore into journalissuearticles values(P<0.05); than the values of OB and FW groups. Hens molted by FW treatment had lower insert ignore into journalissuearticles values(P<0.05); albumen height and Haugh units than other treatments. As conclusion, after examining these production and quality criteria, it can be stated that; non feed withdrawal methods, especially OB program can be used alternative to FW program. But, other non-feed with-drawal programs also can be used successfully as molting procedure.
Keywords : Zorlamalı tüy dökümü, Yem çekmesiz program, Yumurta verimi ve kalitesi, Heterofil lenfosit oranı