The effects of heat stress on milk yield and composition in dairy cattle: meta-analysis study
Özgür Özcan, Serdal Dikmen · 2026
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Description
Özgür Özcan and Serdal Dikmen pooled how heat stress hits milk yield and make-up in dairy cattle. Their 2026 study, run by PRISMA rules and the PICOS frame, gathered 35 stand-alone studies from 2010 to 2023, pooling results with an inverse variance heterogeneity model fit for high mix. Effect sizes used Cohen's d, and spread sources were probed through Temperature-Humidity Index group checks and meta-regression.
Heat stress tracked with lower milk yield at minus 0.723, next to falls in milk fat at minus 0.633, in protein at minus 0.555, and in lactose at minus 0.404 in turn for these traits. Yield falls grew sharper once the Temperature-Humidity Index passed 72. Given heavy mix, the team warns pooled figures should be read as broad world trends, not exact world cut-offs. Future work should weigh total exposure time and local farm microclimates to better foretell yield responses.
Catalog record
| CREATOR | Özgür Özcan, Serdal Dikmen |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 54 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |