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Effects of dietary mulberry leaves on growth, production performance, gut microbiota, and immunological parameters in poultry and livestock: a systematic review and meta-analysis |
Bing Geng1,2,3 
, Jinbo Gao1,2,3,*
, Hongbing Cheng1,2,3
, Guang Guo1,2,3
, Zhaohong Wang1,2,3
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1Shandong Institute of Sericulture, Yantai 264001, China
2Yantai Key Laboratory, Yantai, 264001, China
3Shandong Engineering Technology Research Center, Yantai, 264001, China |
Correspondence:
Jinbo Gao,Email: jinbogao1985@163.com
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Received: 26 October 2023 • Revised: 22 November 2023 • Accepted: 8 January 2024 |
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| Abstract |
Objective
This study aimed to assess the effects of dietary mulberry leaves on the growth, production performance, gut microbiota, and immunological parameters of poultry and livestock.
Methods
The PubMed, Embase, and Scopus databases were systematically analyzed to identify pertinent studies up to December 2022. The effects of mulberry leaf diet was assessed using the weighted mean difference, and the 95% confidence interval was calculated using a random-effects model.
Results
In total, 18 studies that sampled 2,335 poultry and livestock were selected for analysis. Mulberry leaves improved the average daily gain and reduced the feed/meat ratio in finishing pigs, and the average daily gain and average daily feed intake in chicken. In production performance, mulberry leaves lowered the half carcass weight, slaughter rate, and loin eye area in pigs, and the slaughter rate in chickens. Regarding meat quality in pigs, mulberry leaves reduced the cooked meat percentage, shear force, crude protein, and crude ash, and increased the 24 h pH and water content. In chickens, it increased the drip loss, shear force, 45 min and 24 h pH, crude protein, and crude ash. Mulberry leaves also affect the abundances of gut microbiota, including Bacteroides, Prevotella, Megamonas, Escherichia-Shigella, Butyricicoccus, unclassified Ruminococcaceae, Bifidobacterium, Lactobacillus, and Escherichia coli in poultry and livestock. Mulberry leaves at different doses were associated with changes in antioxidant capacity in chickens, and immune organ indexes in pigs. With respect to egg quality, mulberry leaves at different doses improved the shell strength, yolk color, eggshell thickness, and eggshell weight. However, moderate doses diminished the egg yolk ratio and the egg yolk moisture content.
Conclusion
In general, dietary mulberry leaves improved the growth, production performance, and immunological parameters in poultry and livestock, although the effects varied at different doses. |
| Keywords:
Growth; Gut Microbiota; Meta-analysis; Mulberry Leaves; Poultry and Livestock; Production Performance |
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