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REVIEW PAPER
Dietary supplementation with tomato waste to improve
performance and egg quality of laying hens: a meta-analysis
1
National Research and Innovation Agency, Post-doctoral of the Research Center for Animal Husbandry,
16915, Bogor, Indonesia
2
Universitas Muhammadiyah Kotabumi, Faculty of Agricultural and Animal Science, 34517, Kotabumi, Indonesia
3
National Research and Innovation Agency, Research Center for Animal Husbandry, 16915, Bogor, Indonesia
4
IPB University, Animal Feed and Nutrition Modelling Research Group (AFENUE), 16680, Bogor, Indonesia
5
National Research and Innovation Agency, Research Collaboration Center for Biomass and Biorefinery between BRIN
and Universitas Padjadjaran, 16911, Bogor, Indonesia
6
National Research and Innovation Agency, Research Center for Pharmaceutical Ingredients and Traditional Medicine,
16915, Bogor, Indonesia
7
Universitas Andalas, Faculty of Animal Science, 25175, Padang, Indonesia
Publication date: 2023-04-19
Corresponding author
A. Sofyan
Research Center for Animal Husbandry, National Research and Innovation Agency, 16915, Bogor, West Java, Indonesia
Research Center for Animal Husbandry, National Research and Innovation Agency, 16915, Bogor, West Java, Indonesia
J. Anim. Feed Sci. 2023;32(3):221-232
KEYWORDS
TOPICS
ABSTRACT
A meta-analysis was conducted to determine the effect of adding tomato waste to the diet of laying hens on their performance, egg quality,
and blood parameters. A total of 22 articles were selected from five scientific databases such as Scopus, PubMed, ScienceDirect, Web of Science, and Directory of Open Access Journals. R software version 4.2.0, with supporting libraries, including lme4 and lsmeans (least-squares means test), was used for modelling and statistical analysis. The results of meta-analysis showed that the addition of tomato waste to laying hen rations significantly increased feed intake (P < 0.01) and tended to correlate with a quadratic pattern of hen-day egg production (HDEP) (P < 0.061) and egg mass (P < 0.075); however, eggshell strength decreased significantly (P < 0.01). Our findings also demonstrated a significant effect on egg-yolk colour, as assessed by a quadratic pattern (P < 0.01). The lycopene content in egg yolk increased significantly (P < 0.05). Tomato waste supplementation had a significant (P < 0.05) effect on total triglyceride and cholesterol levels in blood serum, which followed a quadratic pattern. This meta-analysis has confirmed that feeding tomato waste to laying
hens exerts positive effects on animal performance and egg quality.
FUNDING
The first author would like to thank the National
Research and Innovation Agency, Indonesia,
for funding the study through the “Postdoctoral
Program”, contract number 64/II/HK/2022.
CONFLICT OF INTEREST
The Authors declare that there is no conflict of
interest.
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