ArticleScientific reports2021
Superiority of coarse eggshell as a calcium source over limestone, cockle shell, oyster shell, and fine eggshell in old laying hens.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed, 19 citations in OpenAlex.
- Optimizing eggshell quality in extended laying periods: Insights and strategies.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2026Review
- Influencing of particle size, calcination, and mineral enrichment of local calcites on productivity and economic efficiency of quails (Journal of advanced veterinary and animal research · 2026Article
- Supplementation effects of feed additive containing eggshell,Journal of animal science and technology · 2025Article
- Article
- Low Ca diet leads to increased Ca retention by changing the gut flora and ileal pH value in laying hens.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2023Article
- Bone and eggshell quality throughout an extended laying cycle in three strains of layers spanning 50 years of selection.Poultry science · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Chicken eggshell (ES) waste is a rich source of calcium carbonate (CaCO
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.