Some productive and reproductive performance, eggshell quality, serum metabolites and immune responses due to L‐threonine supplementation in Japanese quail breeders' diet
Mohammad Amin Omary,
Heydar Zarghi,
Ahmad Hassanabadi
Abstract:A dose‐response experiment was conducted to evaluate the effects of graded levels of dietary digestible threonine (dThr) during the first laying cycle on productive and reproductive performance, egg quality and immune responses of Japanese quail breeders (Coturnix coturnix japonica). Also, dThr requirements were determined based on nutrient dose‐response data. A total of 450 (360 females and 90 males) 11‐week‐old breeders were allocated to five increment (+0.03%) levels of dThr (0.49%, 0.52%, 0.55%, 0.58%, 0.6… Show more
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