ArticleVeterinary medicine and science2025
Effects of Calcium Carbonate Particle Size, Phytase and Midnight Feeding on Performance, Egg and Bone Quality and Blood Parameters in Laying Hens.
Article in Veterinary medicine and science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 5 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
5 citing papers in PubMed.
- Combined Bifidobacterium bifidum and Bacillus toyonensis supplementation in drinking water improves productive efficiency, physiological status, and meat quality in broiler chickens.Poultry science · 2026Article
- Limited incremental response to routine phytase supplementation in Hy-Line Brown laying hens fed mineral-adequate diets.Poultry science · 2026Article
- Dual-strain Bacillus subtilis 597 and 600 complex improves productive performance and nutrient digestibility, egg quality and physiological status in early-to-peak phase laying hens.Poultry science · 2026Article
- 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
- Comparative Study of Feed Form Effects on Productive Performance, Egg Quality and Nutrient Utilization in Laying Hens.Animals : an open access journal from MDPI · 2025Article
Corrections and comments
- Erratum issued
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundTo achieve maximum production in laying hens, calcium (Ca) and phosphorus (P) are two important minerals in the diet. Nutritional solutions such as adding coarser Ca particles in the afternoon or considering the light hours during the night to feed the birds might improve the eggshell quality and reduce Ca mobilization from the bone.
objectivesThis experiment aimed to study the effect of calcium carbonate particle size (CCps), phytase (Pht) and midnight feeding (MF) on the performance, egg and bone quality and blood parameters in laying hens from 60 to 70 weeks of age.
methodsA total of 720 Hy-line (W-36) laying hens were arranged in a factorial arrangement of 2 × 2 × 2 based on a completely randomized design with two types of CCps (100% fine and 75% coarse + 25% fine), two levels of Pht (0 and 300 FTU/kg) and two states of feeding (MF and without MF). The experimental period lasted 12 weeks from 60 to 70 weeks of age.
resultsDuring the trial, the significant impact of CCps on the feed conversion ratio (FCR) and breaking strength (BS) of the tibia was obtained (p < 0.05). FCR, eggshell percentage and the percentage of tibia ash, Ca and P were affected by Pht supplementation (p < 0.05). MF affected egg weight (EW), eggshell percentage and serum concentration of Ca, P and alkaline phosphatase (ALP) (p < 0.05). The interaction effects of CCps and Pht were significant for Ca level in serum (p < 0.05).
conclusionsIn general, the use of Pht in the diets improved the FCR and quality of eggshell and tibia, and diets containing Pht and coarser CCps increased blood Ca levels. Despite the improvement of egg quality by MF, serum parameters showed a significant decrease.
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.