The effect of season and agro-ecology on physicochemical properties of cow's raw milk in Central and North-Western Zone of Tigray, Ethiopia
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View abstract on PubMed
Summary
This summary is machine-generated.Agro-ecology and season significantly affect cow milk
Area Of Science
- Dairy Science
- Food Chemistry
- Agricultural Science
Background
- Milk quality is determined by unique physical, chemical, and biological characteristics.
- Milk components are sensitive indicators of production practices.
- Season and agro-ecology influence the physicochemical properties of cow milk.
Purpose Of The Study
- To investigate the effect of season and agro-ecology on the physicochemical properties of cow's raw milk.
- To assess milk quality in Central and North-Western Zone of Tigray.
- To identify factors influencing milk composition and potential adulteration.
Main Methods
- A two-stage sampling method was used in Aksum, Shire-Indaselassie, and Sheraro.
- 210 milk samples from dairy farms and cafeterias were analyzed across different agro-ecologies and seasons.
- Physicochemical properties (fat, protein, SNF, density, lactose, salt, water added, freezing point) were determined using Lacto scan.
Main Results
- Significant differences (p < 0.05) in protein, solids-not-fat (SNF), lactose, and salt content were observed among agro-ecologies, seasons, and milk sources.
- Overall mean values: fat (3.72%), SNF (6.72%), protein (2.6%), lactose (3.72%), specific gravity (1.026 g/ml), salt (0.53%), water added (19.33%), freezing point (-0.42°C).
- Positive correlations found between specific gravity and SNF, protein, lactose, and salt; negative correlations with water added and freezing point.
Conclusions
- Physicochemical properties of cow's raw milk are influenced by agro-ecology, season, and milk source.
- Milk adulteration, particularly water addition, was more common in milk from cafeterias.
- The study highlights the need for government-established milk quality standards and regulations in Ethiopia.
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