p. 311−323
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p. 325−338
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p. 339−352
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0.05). Treatment containing myrtle leaves had the highest protein intake in compared with control treatment (P<0.05). Digestibility of crude protein and NDF in diet with myrtle in comparison to control significantly increased (P<0.05). But there was no significant difference between the dry matter, organic matter and ADF digestibility of sheep’s (P>0.05). Protozoa population was significantly not affected by inclusion myrtle leaves in the diet (P>0.05). Ammonia levels in diets treated with myrtle (8.29) significantly reduced in compared with the control (16.5) (p<0.05). The myrtle leaves treatment decreased triglyceride and blood glucose of sheeps (P<0.05). Factors such as period of adaptation to medicinal herbs and interaction with other dietary components and their amounts in the diet, can influence the amount of dry matter intake. Essential oils according to chemical structure, resources and activities have different effects on rumen fermentation and animal performance. The negative effect of active ingredients of medicinal plants on ammonia-producing bacteria caused to decrease of rumen ammonia production, also reducing protozoa and swallowing of bacteria that can be other reason for ammonia decrease. Polysaccharides, flavonoids, glycoproteins, polypeptides, steroids, alkaloids and pectin in plants such as myrtle can justify the hypoglycemic properties of these plants. Medicinal plants and their extracts are effective in reducing blood cholesterol and other lipids. It is reported essential oil reduces pH of intestinal tract through production of degrading enzymes of bile, also inhibit the activity of HMG-COA enzyme.
Conclusion: According to the results, it seems 0.4 % myrtle leaves has beneficial effects on digestibility and can reduce blood glucose and triglyceride; therefore, maybe it can be used as an herbal supplement in Arabi sheep diet.]]>
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0.05). FCR was increased significantly in starter by addition of feed additives (WPLE and flavomicine). Means by non-significant differences in this study, maybe due to normal rearing condition. Researcher believed that plant secondary metabolite can exert their positive effects on critical condition. There were no significant differences in immunity and carcass parameters (P>0.05).TG and VLDL content of broiler serum were lower in WPLE2 and WPLE3 groups rather than PC. Dietary treatments did not affected Coliform population but increased Lactobacillus and decreased Escherichia coli population of cecal content significantly (P<0.05). The antibacterial properties of plant extracts could be attributed mainly to their phenolic components and their mechanisms of action on the microbial cell. A possible explanation for the stimulatory effect of polyphenolic compounds on beneficial bacterial growth is that some microorganisms are able touse these compounds as nutritional substrates. In the particular case of lactobacilli, these bacteria possess the ability to metabolize phenolic compounds supplying energy to cells and positively affecting the bacterial metabolism. The pH of ileal digesta was decreased significantly in 0.2 and 0.3% of WPLE (P<0.05). Increasing lactobacilli bacteria population can decrease pH of gut digesta.
Conclusion: The results of this experiment suggest that WPLE can increase population of beneficial bacteria and decrease pathogen bacteria in cecal content and can lowering pH of ileal digesta.]]>
p. 367−379
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p. 381−391
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p. 393−402
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p. 403−416
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p. 417−424
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p. 425−434
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