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The effects of herbal plant extract on the growth performance, blood parameters, nutrient digestibility and carcase quality of rabbits: A meta-analysis. | LitMetric

AI Article Synopsis

  • A meta-analysis of 33 studies examined the impact of herbal plant extracts on farmed rabbits, focusing on growth performance, blood parameters, nutrient digestibility, and carcass quality.
  • Results indicated that while average daily gain and final body weight were unchanged, herbal supplements improved feed conversion ratios, reduced mortality, and enhanced digestibility of dry matter and crude protein.
  • Additionally, herbal extracts positively influenced blood lipid profiles, increasing HDL and decreasing LDL, while also increasing carcass percentage; specific herbs like Moringa, olive oil, and pepper showed more significant benefits compared to others.

Article Abstract

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 ( < 0.01) feed conversion ratio and mortality and increased the digestibility of dry matter (DM) ( = 0.014) and crude protein (CP) ( = 0.018). The herbal extracts also increased ( = 0.037) blood high-density lipoprotein (HDL) and decreased ( = 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 ( = 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.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10877253PMC
http://dx.doi.org/10.1016/j.heliyon.2024.e25724DOI Listing

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