Changes in milk fat globule physical properties and milk fatty acid composition throughout the lactation cycle of Laoshan goat.

ABSTRACT: The objective of this study was to investigate the effect of lactation stage on the physical properties of milk fat globules (MFGs) and profiles of milk fatty acids (FAs) of milk from Laoshan dairy goats. Goat colostrum and milk samples were collected on days 1, 3, 30, 90, 150, and 240 postpartum. Milk fat content was found to significantly decrease during the first 90 d of lactation and increase thereafter as lactation progressed (P < 0.01). Average area particle size and volume particle size of MFGs showed trends similar to those of the milk fat content of goat milk with the extension of lactation, and the lowest levels were 2.39 μm and 3.97 μm on day 90, respectively (P < 0.01). The zeta-potential of MFGs significantly increased before 30 d of lactation, with a slight drop on day 90. It

SUBMITTER: Fan R 

PROVIDER: S-EPMC9951261 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature