Umam, Ahmad Azmi Khoirul (2017) Effect of Somatic Cell Count on Milk Quality of Holstein-Friesian Cows in Different Season. Magister thesis, Universitas Brawijaya.
Abstract
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English Abstract
The somatic cell count (SCC) is presently used as an indicator of raw milk quality and reflected the udder health status of the herd. During mastitis, SCC in milk drastically increases, which is associated with changes of milk quality. The aim of this study were to investigate the effect of bulk milk somatic cell count on milk quality of Holstein-Friesian cows, to evaluate a seasonal factor that influences bulk milk somatic cell count and milk quality, to investigate the effect of individual somatic cell count on milk quality of Holstein-Friesian cows, and to understand a relationship between bulk milk somatic cell count and milk quality. Milk Samples were collected from dairy farms at Pingtung, Taiwan during December 2016 to June 2017. All samples were analyzed for protein, fat, lactose percentage, pH, titratable acidity, ionic calcium, ethanol stability, and total bacterial count (TBC). In experiment I, milk samples from bulk tank in dairy farms were allotted into 3 groups according to total SCC, including group 1 with SCC below 200×103 cells/mL, group 2 with SCC ranged from 200×103 to 500×103 cells/mL, and group 3 with SCC ranged from 500×103 to 750×103 cells/mL respectively. In experiment II, milk samples from individual cows were collected from the IV healthy quarter (below 400×103 cells/mL) and infected quarter of the same cow for comparing influence of mastitis on milk quality. Statistical Analysis System (version 9.3, SAS) was used to perform data analysis using the general wlinear model (GLM). Duncan multiple range test was used for comparison of mean of treatments. Correlation coefficient was also established to investigate the relationships between parameters. The somatic cell count of bulk milk (BMSCC) influenced the milk quality in the dairy farm. The bulk milk with higher BMSCC showed higher fat, protein percentage, ionic calcium content, pH, and TBC (p < 0.01), and lower lactose percentage and ethanol stability (p < 0.01). Total bulk milk somatic cell count between summer and winter season were significantly different (p < 0.05). Differences among seasonal milk fat, lactose percentage, and ionic calcium contents were siginificant (p < 0.05). The highest bulk milk somatic cell counts were observed in summer season. The milk samples from infected quarter showed higher fat, protein percentage, ionic calcium content, pH, and TBC (p < 0.05), and lower lactose percentage, titrable acidity and ethanol stability (p < 0.05). Therefore, bulk milk somatic cell count level in the dairy farm showed a good indication for evaluating milk quality, including fat, protein, lactose, pH, ionic calcium, ethanol stability and total bacterial count.
| Item Type: | Thesis (Magister) |
|---|---|
| Identification Number: | TES/637.1/UMA/e/2017/041710810 |
| Uncontrolled Keywords: | SOMATIC CELLS, COWS, MILK - QUALITY, BLOOD CELL COUNT, HOLSTEIN - FRIESIAN CATTLE |
| Subjects: | 600 Technology (Applied sciences) > 637 Processing dairy and related products > 637.1 Milk processing |
| Divisions: | S2/S3 > Magister Ilmu Ternak, Fakultas Peternakan |
| Depositing User: | Nur Cholis |
| Date Deposited: | 15 May 2018 01:46 |
| Last Modified: | 26 Nov 2021 05:58 |
| URI: | http://repository.ub.ac.id/id/eprint/10523 |
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