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Title: The effects of herbal plant extract on the growth performance, blood parameters, nutrient digestibility and carcase quality of rabbits: A meta-analysis
Authors: Danung Nur Adli 
Agung Irawan 
Yuli Arif Tribudi 
Syahputra Wibowo 
Amirul Faiz Mohd Azmi 
Osfar Sjofjana 
Anuraga Jayanegara 
Heli Tistiana 
Teguh Wahyono 
Siska Aditya 
Mohammad Miftakhus Sholikin 
Sadarman Sadarman 
Keywords: Bio-active;Feed conversion ratio;Herbal plant extract
Issue Date: 2024
Publisher: Elsevier Ltd.
Journal: Heliyon 
A meta-analysis was conducted to determine the effects of herbal plant extracts on the growth performance, blood parameters, nutrient digestibility and carcase quality of farmed rabbits. A dataset was created from 33 in vivo studies comprising 121 experimental units. Statistical meta-analysis was performed using a random-effects model and linear-mixed model meta-regression using R software (v. 4.3.0). Our results showed that although supplemental herbs did not affect average daily gain (ADG) and final body weight (BW), they reduced (P < 0.01) feed conversion ratio and mortality and increased the digestibility of dry matter (DM) (P = 0.014) and crude protein (CP) (P = 0.018). The herbal extracts also increased (P = 0.037) blood high-density lipoprotein (HDL) and decreased (P = 0.004) low-density lipoprotein (LDL). Immunoglobulin M (IgM) was elevated (P = 0.009) by herbal plant extract supplementation, although most blood components were unaffected. The inclusion of herbal plant extract up to 300 g/kg increased (P = 0.011) carcase percentage while the weight and percentage of other organs were unaffected. Subgroup meta-analysis further explained the different effect of the type of herbal plant extract. Moringa, olive oil, and pepper were more favourable to increase final BW compared to the other herbs. Interestingly, the majority of herbs showed efficacy in reducing mortality. A majority of the response variables in our meta-analysis showed no dose-response effect except for ADG, mortality, HDL, and LDL which were improved by herbs supplementation. The evidence from the perspective of both meta-analysis and meta-regression shows that the addition of herbs tends to positively affect the parameters for production performance and blood metabolites in farmed rabbits.
Web of Science / Scopus
ISSN: 24058440
DOI: 10.1016/j.heliyon.2024.e25724
Appears in Collections:Faculty of Veterinary Medicine - Journal (Scopus/WOS)

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