نوع مقاله : مقاله کامل
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت
2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت، جیرفت.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Abstract
Introduction: In recent years, the use of natural compounds, particularly medicinal plants, as alternatives
to chemical additives in animal nutrition has attracted considerable attention. Myrtus communis is among
the medicinal plants with multiple bioactive constituents, including flavonoids, tannins, essential oils, and
phenolic acids, which may influence the physiological performance of livestock.Objectives: Given the limited
experimental studies on the effects of Myrtus communis leaves in ruminants, this study was designed to
investigate the effects of different inclusion levels (2.5% and 5% of dietary dry matter) of Myrtus communis
leaves on feed intake, nutrient digestibility, blood metabolites, and liver enzymes in Kermani sheep.Methods:
Fifteen one-year-old male Kermani lambs with an average body weight of 32.2 ± 2 kg were randomly
assigned to three experimental groups: control (without Myrtus leaves), treatment 1 (2.5% Myrtus leaves),
and treatment 2 (5% Myrtus leaves). The experimental period consisted of 14 days of adaptation followed
by 7 days of sampling. Data were analyzed using a completely randomized design, and treatment means
were compared using Tukey’s test at a 5% significance level.Results: feed intake was significantly higher in
treatment 1 than in the treatment 2 and control groups, whereas the digestibility of dry matter, organic matter,
NDF, ADF, and crude protein was not affected by the treatments. Blood metabolites and hematological
indices showed no significant differences among the groups. AST levels in treatment 2 were significantly
higher than those in the control group (P < 0.05), and ALT levels were significantly higher in both treatment
groups than in the control group.Conclusion: The observed increase in liver enzyme activities, particularly
AST and ALT, suggests a potential risk of hepatic stress. Therefore, the use of Myrtus communis leaves in
sheep nutrition should be approached with caution, and further studies are recommended to determine safe
inclusion levels and evaluate their long-term effects.
کلیدواژهها [English]
)