Publications by authors named "G J Martinez-Marin"
Article Synopsis
- Rotational crossbreeding's impact on enteric methane emissions in dairy cows hasn't been thoroughly researched, particularly during lactation, and this study aims to fill that gap.
- Milk infrared spectra measurements were used to estimate various traits, including methane emissions, in a sample of 1,059 cows, revealing differences between crossbred and purebred Holsteins.
- The study found that while infrared spectroscopy effectively predicts methane yield and intensity, it falls short for overall daily methane production, which peaks later in lactation compared to milk yield, suggesting a complex relationship between these variables.
Effect of calving age on genetic evaluation of milk yield in Holstein cattle.
Trop Anim Health Prod
January 2020
The aim of this study was to evaluate the effect of including calving age (CA) on genetic evaluation models for Holstein cattle. The evaluated models included the permanent environment, the sire-herd interactions, and the animals and residual effects as random. The fixed effects included the average production of milk, fat, and protein and the herd-year-season effect.
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