Supplementation of reduced protein diets with
نویسندگان
چکیده
Context Improving immune status through nutritional adjustments may be part of an effective strategy to reduce reliance on antibiotic growth promoters for controlling necrotic enteritis (NE) in broiler chickens. Aims This study examined the effect dietary protein level and replacement crystalline l-arginine (Arg) with l-citrulline (Cit) reduced-protein diet performance broilers challenged subclinical NE. Methods Ross 308 cockerels (n = 720) were randomly allocated six treatments, eight replicates 15 birds per pen, during a 35-day feeding experiment. The treatments as follows: standard without NE challenge (SP−); (SP+); reduced (two percentage points lower crude protein) (RP−); (RP+); RP+ plus added Arg (103% RP, RPA+) RPC+ where supplemental RPA+ was replaced Cit. first four considered 2 × factorial arrangement, factors being (− or +) (SP RP). Treatments SP+, RP+, RPA+, analysed by one-way ANOVA. Key results Subclinical feed intake (FI), body weight gain (BWG) increased ratio (FCR) from Day 0 35, intestinal lesion scores 16, relative breast yield 35 (P < 0.05). Feeding RP diets FI 0.001), BWG 0.01) FCR grower phase compared SP when Birds treatment had overall than did those SP+ 0.001). similar FI, > Conclusions Collectively, showed protective effects replacing Cit against diets, indicated higher after challenge. Implications supplemented
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ژورنال
عنوان ژورنال: Animal Production Science
سال: 2022
ISSN: ['1836-5787', '1836-0939']
DOI: https://doi.org/10.1071/an21393