Effects of L-arginine and L-citrulline supplementation in reduced protein diets for broilers under normal and cyclic warm temperature
| Autor: | Nishchal K. Sharma, Hiep Thi Dao, Robert A. Swick, Emma J. Bradbury |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Low protein
Arginine SF1-1100 Fat pad Heat stress 03 medical and health sciences chemistry.chemical_compound Animal science Food Animals Citrulline medicine Original Research Article 030304 developmental biology 0303 health sciences Meat chickens Chemistry 0402 animal and dairy science Broiler 04 agricultural and veterinary sciences L-citrulline 040201 dairy & animal science Animal culture Animal Science and Zoology medicine.symptom Weight gain |
| Zdroj: | Animal Nutrition, Vol 7, Iss 4, Pp 927-938 (2021) Animal Nutrition |
| ISSN: | 2405-6545 |
| Popis: | Heat stress causes significant economic losses in the broiler industry. Dietary supplementation of arginine (Arg) and citrulline (Cit) might increase the performance of broilers raised under warm temperature due to vasodilation effects. This study investigated the effects of L-Arg or L-Cit supplementation in broilers fed a reduced protein wheat-based diet deficient in Arg under thermoneutral (NT) and cyclic warm temperature (WT). Ross 308 cockerels (n = 720) were randomly allocated to 4 dietary treatments with 12 replicates of 15 birds per pen from d 7 to 21. The 4 treatments were: normal protein (NP), i.e., 22.3% and 20.9% crude protein in grower and finisher, respectively; reduced protein (RP), i.e., 2.5% lower protein and deficient in Arg; and RP supplemented with 0.28% Arg (RP-Arg) or 0.28% Cit (RP-Cit). A factorial arrangement of treatments was applied during the finisher phase (21 to 35 d). Factors were: diet (4 diets above); and temperature, NT (24 °C) or cyclic WT (33 ± 1 °C for 6 h per day) with 6 replicate pens per treatment. During 7 to 35 d and 21 to 35 d, the birds fed the RP diet had lower body weight gain (BWG) and higher FCR compared to the NP diet (P 0.05) compared to birds exposed to NT. Diet by temperature interactions were not observed for performance parameters during the period of WT (P > 0.05). On d 35, the RP-fed birds had a lower yield of thigh and drumstick, higher fat pad, lower femur ash, and breaking strength but similar serum uric acid level and higher nitrogen digestibility on d 21 compared to those offered NP (P |
| Databáze: | OpenAIRE |
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