Effect of replacing cottonseed meal with canola meal on growth performance, blood metabolites, thyroid function, and ruminal parameters of growing lambs.

Autor: Agwa HMM; Biological Applications Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt. h.agwa@yahoo.com., Saleh HM; Biological Applications Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt., Ayyat MS; Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, Egypt., Abdel-Rahman GA; Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, Egypt.
Jazyk: angličtina
Zdroj: Tropical animal health and production [Trop Anim Health Prod] 2023 Mar 18; Vol. 55 (2), pp. 122. Date of Electronic Publication: 2023 Mar 18.
DOI: 10.1007/s11250-023-03528-0
Abstrakt: The objective was to clarify the impact of replacing cottonseed meal with canola meal (CM) on growth performance, blood metabolites, thyroxin function, and ruminal parameters of growing lambs. Twenty-four growing Barki male lambs (4-5 months of age) were assigned randomly into four equal groups (6 lambs each). Four dietary treatments were the control group with 0% CM (CON) and three experimental groups where CM replaced 25% (CN 1 ), 50% (CN 2 ), and 75% (CN 3 ) of cottonseed meal. There were no dietary effects (P > 0.05) on the lambs' feed intake, average daily gain, and feed conversion ratio of the lambs. The dietary CM linearly decreased the concentrations of serum total proteins (P = 0.003), albumin (P = 0.010), globulin (P = 0.011), AST (P = 0.041), and urea (P = 0.001) in growing lambs. The levels of ALT and creatinine, however, were not significantly affected by dietary treatments (P > 0.05). Furthermore, serum triiodothyronine, thyroxine, and electrolyte concentrations were similar (P > 0.05) in different dietary groups. Dietary treatments significantly affected the values of ruminal pH and ammonia at 0 h (P = 0.003 and 0.048, respectively) and 3 h (P = 0.033 and P = 0.006, respectively) postfeeding. The CN 3 group showed significantly higher concentrations of ruminal ammonia at 0 and 3 h postfeeding. Furthermore, dietary CM (CN 3 ) significantly reduced the ruminal pH values at 0 and 3 h postfeeding. Meanwhile, dietary treatments did not affect the concentration of total VFAs in the ruminal fluid. In conclusion, CM can replace the cottonseed meal (up to 75%) in lamb diets without compromising their growth performance, thyroid function, and ruminal fermentation parameters.
(© 2023. The Author(s).)
Databáze: MEDLINE
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