Effects of Different Dietary Rosmarinus Officinalis Powder and Vitamin E Levels on the Performance and Gut Gross Morphometry of Broiler Chickens

Abstract

The main objective of the present study was to evaluate the effects of the dietary addition of different levels of rosemary powder (RP) and vitamin E (VitE) on broiler performance and gut gross morphometry. A total of 270 one-day-old Ross 308 male chicks were randomly assigned to nine dietary treatments with three replicates of10 birds each. Treatments consisted of diets were supplemented with 0, 0.5 or 1.0% RP and 0, 100 or 200 mg/kg VitE (alpha-tocopherol acetate). Feed intake and weight gain were recorded weekly. On day 42, one bird per replicate was euthanized after blood sampling. Gastrointestinal tract segments were measured and/or weighed. Means were compared by least significant difference. Overall, broilers fed1.0% RP presented lower (p< 0.05) feed intake, weight gain, and final weight body than those fed 0.5% RP. Broilers fed the 0.5% RP plus 200 mg/kg VitE diet presented higher weight gain (p<0.05) in than those in the control group (0% RP and 0 mg VitE). Jejunum length and weight, colon length and width, and right cecum weight were also negatively affected (p<0.05) by the 1.0% RP diet when compared with the 0.5% RP diet. We suggest that the dietary supplementation of 0.5% RP plus 200mg/ kg of vitE improves broiler performance and does not have significant adverse effects on gross gut morphometry. Dietary VitE may play a potential protective role against the negative effects of high levels of RP.

Evaluation of polyherbal formulation and synthetic choline chloride on choline deficiency model in broilers: implications on zootechnical parameters, serum biochemistry and liver histopathology

“…The generated data were analysed using one-way analysis of variance technique with replicate as a blocking factor to see whether blocking was effective at reducing the random error. In case of significant differences among treatments (p<0.05), the means were subjected to least significance difference test (IBM SPSS Statistics Version.21.0; SPSS Inc., Chicago, IL, USA) [ 26 ] to draw a comparison between the groups for each investigational parameter. The value p<0.05 was considered as statistically significant.…”

Plant Feed Additives as Natural Alternatives to the Use of Synthetic Antioxidant Vitamins on Poultry Performances, Health, and Oxidative Status: A Review of the Literature in the Last 20 Years

“…A similar increase in FI (2.0% on average) was observed in comparison with the VitE (200 mg/kg) supplemented group [ 27 ]. Nevertheless, in broilers, the dietary inclusion of rosemary powder (RPO; 1% of the diet) compared with VitE (200 mg/kg) lowered the FI (by 4.3%) in a 42 days feeding trial [ 28 ].…”

“…The GP (from 0.05% to 10% doses) compared with VitE (200 mg/kg) inclusion in broilers’ diet did not impair feed:gain ratio (F:G) after 21 [ 15 ] or 42 days [ 34 ]. The F:G ratio of broilers and ducks was not affected by the dietary addition of CE, TE, SE, MX [ 19 ], RL [ 17 ], OAE [ 42 , 43 ], OO [ 22 , 45 ], OO, and RO alone or in different combinations [ 24 ], nor were TP [ 47 ] and RP [ 28 ] affected in comparison with VitE (from 150 to 200 mg/kg). Moreover, in broilers and ducks, the dietary inclusion of different natural antioxidants [ 46 ], OLE under HS [ 26 ], hesperidin [ 48 ], and polyphenols [ 37 , 38 , 39 ] compared with VitE (150–200 mg/kg) did not affect the F:G ratio.…”

“…Broilers supplemented with GP (1.5% of the diet) compared with VitE improved relative length of duodenum and ceca (by about 9.0%) [ 14 ]. On the other hand, RPO addition (0.5–1% of the diet) in broilers’ diet negatively affected jejunum length and weight, colon length and weight, and right cecum weight, but no significant differences were reported concerning these anatomical traits compared with those consuming two different levels of VitE (100 and 200 mg/kg) [ 28 ]. The dietary supplementation with GP (5%, 7.5%, and 10% of the diet) for 42 days affected broilers’ mucosa status and microscopic structure [ 34 ].…”

Comparison between rosemary and commercial antioxidant blend on performance, caecal coliform flora and immunity in broiler chickens fed with diets containing different levels of poultry fat

“…This additive can be supplied at broiler diet as rosemary powder (RP) form or using their essential oils (Yesilbag et al 2011). Recently, we have tested in our laboratories the effect of RP, as feed additive, on broilers performance and gut gross morphometry (Rostami et al 2015). However, to our knowledge, the effects of RP on bird physiology were not sufficiently evaluated in broilers fed at different levels of poultry fat (PF).…”