Non-genetic effects on daily milk yield and components of Holstein cows in Morocco

Assessing the relationship between somatic cell count and the milk mid‐infrared spectrum in Chinese Holstein cows

“…The effects of other fixed factors, including parity, stage of lactation and month of calving, on the milk composition were comparable with previous studies 25–28 . Nevertheless, the effects of these factors on the milk composition were not the specific focus of the present study and were previously discussed in research conducted within the same region 25–28 …”

“…The SCS exhibited a weak correlation with total solids, and the fixed factor of SCC class had no significant effect on total solids, which was supported by Yang et al 23 and Guan et al 19 The milk urea concentration showed a very weak correlation with the SCS, and the least squares means were not significantly different in classes 1 and 2 and were significantly higher than those in class 3, which was in accordance with the studies of Benedet et al 21 and Bobbo et al 24 The effects of other fixed factors, including parity, stage of lactation and month of calving, on the milk composition were comparable with previous studies. [25][26][27][28] Nevertheless, the effects of these factors on the milk composition were not the specific focus of the present study and were previously discussed in research conducted within the same region. [25][26][27][28] Finally, the relationships between SCC and MIR spectral wavenumbers were demonstrated.…”

“…[25][26][27][28] Nevertheless, the effects of these factors on the milk composition were not the specific focus of the present study and were previously discussed in research conducted within the same region. [25][26][27][28] Finally, the relationships between SCC and MIR spectral wavenumbers were demonstrated. The first region (wavenumbers 925-1582 cm −1 ) is called the 'fingerprint region' because it contains some important chemical bonds (C-H, aromatic C=C, C-O and N-O) in milk and is associated with the absorbance for milk compositions such as protein, lactose and urea.…”

A systematic review of effect of calving season and parity as non-genetic factors on milk production traits of cattle

“…Out of 15 reviewed studies, only 33.33% (n = 5) of them studied fat, followed by 26.67% (n = 4) that investigated protein (Mostert et al, 2001;Jónás et al, 2016;Barsila., 2019;Boujenane., 2021), with 20% (n = 3) of them studying lactose (Jónás et al, 2016;Barsila., 2019;Boujenane., 2021) and 6.67% (n = 1) SCS (Boujenane., 2021).…”

“…Out of the 10 reviewed papers, only 4 of them considered fat, and the findings showed that 3 articles discovered that parity had a significant effect on fat, whereas 1 showed that parity had no significant effect on fat. The results also indicated that 3 articles showed parity had significant effect on protein (Jónás et al, 2016;Barsila., 2019;Boujenane., 2021), lactose (Jónás et al, 2016;Barsila., 2019;Boujenane., 2021), and only 1 article showed the significance on SCS (Boujenane., 2021).…”