The use of essential oils as a growth promoter for small ruminants: a systematic review and meta-analysis.

F1000Research
Faizal AndriMarjuki Marjuki

Abstract

Background: Due to their antimicrobial properties and safety, essential oils are currently proposed as a sustainable option for antibiotic alternatives in the livestock sector. This current systematic review and meta-analysis investigated the effects of dietary essential oil supplements on dry matter intake (DMI), average daily gain (ADG), and feed conversion ratio (FCR) of small ruminants. Methods: A total of 12 studies (338 small ruminants) were included in this meta-analysis. The overall effect size was quantified using Hedges' g with 95% confidence interval (CI) using a fixed-effect model. Publication bias was inspected using Begg's and Egger's tests, followed by trim and fill method to detect the number of potential missing studies. Results: Insignificant heterogeneity among studies was detected both on DMI ( P of Q = 0.810; I-square = 0.00%), ADG ( P of Q = 0.286; I-square = 17.61%), and FCR ( P of Q = 0.650; I-square = 0.00%). The overall effect size showed that essential oils supplementation had no significant impact on DMI (Hedges' g = -0.12; 95% CI = -0.50 to 0.26; P = 0.429) and FCR (Hedges' g = -0.17; 95% CI = -0.55 to 0.22; P = 0.284), but had a significant positive impact on ADG (Hedges' g = 0.44; 95% CI = 0.12 to...Continue Reading

References

Oct 6, 1997·BMJ : British Medical Journal·M EggerC Minder
Jul 12, 2002·Statistics in Medicine·Julian P T Higgins, Simon G Thompson
Jul 22, 2009·PLoS Medicine·David MoherUNKNOWN PRISMA Group
Dec 5, 2015·Frontiers in Microbiology·Charles J NewboldNeil R McEwan
Sep 1, 2015·Animal Nutrition·Metha WanapatSungchhang Kang

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