ArticlePoultry science2026
Reconsidering amino acid matrix values: 6-phytase benefits beyond phosphorus release but limited growth recovery in lysine-deficient diets.
Article in Poultry science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The efficancy of commercial 6-phytases in reduced digestible lysine (dig. Lys) diets, formulated to the ideal amino acid (AA) profile, remains insufficiently studied. A total of 896 Ross 308 broilers were assigned to seven dietary treatments for 41 days (8 replicates × 16 birds). Diets included a positive control (T1; dig. Lys per Ross 308 guidelines, no phytase), a negative control (T2; 3% dig. Lys below guidelines, no phytase), and five NC diets with different 6-phytases (T3-T7). Available phosphorus (avP) in T1 and T2 was supplied via dicalcium phosphate, while phytase diets were formulated with matrix contributions of 0.19% calcium (Ca), avP, and 0.03% Na. Parameters assessed were performance, intestinal morphology, caecal short-chain fatty acids (SCFAs), nutrient digestibility, tibia mineralization, and microbial counts. T1 birds showed significantly higher (p < 0.05) BW and BWG than all others. Despite partial recovery with phytase, FCR increased (p < 0.05) by 3.85-5.12% in T3-T7 compared to T1. Acetate and total SCFAs increased in phytase groups (notably T4, T5), while butyrate rose in T5 and T7. T5 birds had the tallest villi, and T4-T5 recorded the largest villus surface area. Tibia ash and P were elevated in T5 and T7. Digestibility of phosphorus, crude protein (CP), and dry matter increased with phytase, peaking in T4-T7 (p < 0.05). Aerobic and lactic acid bacteria increased in T4-T7, while coliforms were unaffected. Certain phytases, especially in T4, T5, and T7, improved gut health, nutrient utilization, and bone mineralization in reduced-dig. Lys diets, though growth performance was not fully restored. In conclusion, phytase manufacturers may need to re-evaluate their recommended AA matrix values.
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.