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Interactive Effects of Threonine Levels and Protein Source on Growth Performance and Carcass Traits, Gut Morphology, Ileal Digestibility of Protein and Amino Acids, and Immunity in Broilers by I. Ahmed; S.N. Qaisrani; F. Azam; T.N. Pasha; F. Bibi; S. Naveed; S. Murtaza is a Agricultural and Biological Sciences article available to read on EtoBox.

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An experiment was executed to test the hypothesis that supplementation of dietary threonine (**d-Thr**), above NRC recommendation to diets containing poorly digestible protein source (**PS**) may compensate its detrimental effects on overall performance of broilers. In total, nine hundred 1-day-old mixed sex broilers (Ross-308) were randomly distributed over 6 (2 × 3) experimental diets comprising 5 replicates of 30 broilers each for 35 d. The experimental diets contain either soybean meal (**SBM**) or canola meal (**CM**) with 3 levels (100, 110, and 120% of NRC recommendation) of d-Thr. During the course of the trial (0 to 35 D), interactions (__P__ < 0.05) between PS and d-Thr were observed for feed intake (**FI**), body weight gain (**BWG**), feed conversion ratio (**FCR**), carcass, and gut health parameters. The broilers fed recommended level (100%) of d-Thr had 7 and 5% poorer FCR compared with those fed diets with 110 and 120% d-Thr, respectively. For villus height (**VH**), an interaction (__P__ = 0.007) was found between PS and d-Thr level. Broilers consuming SBM diets had 22% longer villi, 10% deeper crypts, and 30% greater VH to crypt depth ratio (**VCR**) compared to t

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Author

I. Ahmed; S.N. Qaisrani; F. Azam; T.N. Pasha; F. Bibi; S. Naveed; S. Murtaza

Publisher

Elsevier BV

Published

2019

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)