The Effect of Rosemary (Rosmarinus officinalis) and Blackcurrant Extracts (Ribes nigrum) Supplementation on Performance Indices and Oxidative Stability of Chicken Broiler Meat

Abstract

The effects of dietary supplementation with extracts of rosemary (RO) and blackcurrant (BC) on the performance indices and the oxidative stability of broiler meat were investigated during a 35-d experiment. For the experiment, 120 one-day-old male Hubbard Flex broiler chicks were randomly allocated to 5 experimental groups (control group and 4 treatments, each in 6 replications, 24 birds per group, 4 birds per replicate) and fed control starter and grower diets or basal diets containing two concentrations (2.5 and 5 g/kg) of the RO and BC extracts. Basic performance traits (body weight gain, feed intake, feed conversion) were recorded during the trial. At the end of the experiment, pectoral and thigh muscles were collected. Thiobarbituric acid (TBA) assays using the muscles samples were performed after 1 and 5 d of chilling (4 °C) and after 90 d of frozen storage (−18 °C). The inclusion of RO and BC in the birds’ diet had no significant effects on weight gain and feed conversion ratio of chickens, or on carcass characteristics, compared with control group. Enrichment of chicken diet with RO and BC did not affect the oxidative stability of chicken breast muscles, but the tested extracts significantly reduced the malondialdehyde (MDA) formation in frozen thigh muscles.

Effect of Dietary Supplementation with Rosemary Complex Powder on the Growth Performance of Native Chickens

“…As shown in Figure 1, no significant among-group differences were noted, but group B tended to have a higher body weight. Similar findings have been reported by Sierżant et al (2021), who confirmed no significant effect on the average body weight of broilers after supplementation of diets with two concentrations (0.25 and 0.5 %) of rosemary and blackcurrant extracts. Petricevic et al (2018) reported that the use of 0.2% rosemary in diets caused no significant differences in average daily gain, but 0.4 and 0.6% supplemented rosemary powder in broiler feed could improve average daily gain and feed conversion ratio.…”

Effects of main active components of rosemary on growth performance, meat quality and lipid metabolism in finishing pigs

“…Additionally, UA reduced the TC level, suggesting that RA and UA may have an effect on lipid metabolism in pigs. Previous studies have shown positive effects of rosemary extract ( Yesilbag et al., 2011 ), RA and UA on growth performance in broiler chickens ( Cheng, 2018 ; Shang et al., 2022 ), while other studies showed that dietary RA showed no significant effect on growth performance in chickens ( Sierżant et al., 2021 ). In the current study, there was no statistically significant difference in growth performance among the groups, although the ADG was 0.83 kg/d and 0.91 kg/d in the CTL and RA goup, respectively.…”

Medicinal Plants and Natural Substances for Poultry Health: A Review

“…Rosemary decreased production of secondary lipid oxidation compounds like hexanal by up to 32% compared to control meat. The enhanced antioxidant capacity extended shelf life (121).…”