Variability and correlation between basic quality parameters of raw cow milk

Abstract

In this paper the results of the analysis of the milk somatic cell count are presented, as well as correlation between the somatic cell count and content of certain chemical parameters in milk (milk proteins, fat, lactose and dry matter without fat) determined in collective samples of milk obtained from cows reared in intensive rearing system, during two production years. The research was carried out by control of collective milk samples from cows reared on family holdings. Somatic cell count, as well as the chemical quality of milk, were controlled daily in the laboratory for raw milk in dairy plant AD "Mlekara"-Subotica using the apparatus CombiFoss 6200 FC. In this investigation, statistically significant correlation (P<0,001) between all observed milk parameters was determined. Positive, weak and statistically highly significant correlation between the content of milk fat and proteins in milk and somatic cell count was established. It was also established that the variability of chemical parameters of milk and somatic cell count is also under the influence of different factors, such as: month of control, year of the research and farm.

The comparison of milk production and quality in cows from conventional and automatic milking systems

“…In contrast to a negative correlation between fat content and SCC in our study, a positive relationship was found between fat content and logarithm of SCC in a study by Friggens and Rasmussen (2001). Strong correlations were calculated between the contents of protein and casein (r = 0.733; P<0.01) and FFDM (r = 0.791; P<0.01), which is in agreement with the relationship between the contents of protein and FFDM found by Memiši et al (2011). The content of protein was negatively correlated with SCC (r = -0.255; P<0.05).…”

“…The contents of fat and FFDM were moderately correlated in our study (r = 0.414; P<0.01). Similar values (r = 0.34; P<0.001) were previously determined for Holstein cows (Memiši et al (2011). The content of fat was correlated negatively with SCC (r = -0.279) and positively with FP (r = 0.282; P<0.05).…”

“…The content of fat was correlated negatively with SCC (r = -0.279) and positively with FP (r = 0.282; P<0.05). Low (r = 0.06), positive and significant (P<0.001) correlations were reported previously (Memiši et al, 2011). In contrast to a negative correlation between fat content and SCC in our study, a positive relationship was found between fat content and logarithm of SCC in a study by Friggens and Rasmussen (2001).…”

Macar Siyah Alaca İneklerinde Süt Verimi, Bileşimi ve Somatik Hücre Sayısını Etkileyen Genetik Olmayan Faktörler

“…This cases show the importance of non-genetic factors on milk production markers. In addition to reaching high quantity, determination of somatic cell count (SCC) is regarded as the principal process for monitoring quality of cow milk [10][11][12] . Somatic cells are responsible for natural defence system and contain lymphocytes, macrophages, epithelium cells and polymorphonuclear cells [13] .…”

“…Studies revealed that high SCC adversely affects milk composition and processing level [8,14] . It has been indicated that elevation of SCC from 50x10 3 cells/ml to 800x10 3 cells/ml caused to reduction in milk yield by 6.3% in primiparous cows and 9.6% in cows in the third or later parities [10] . Today, modern dairy industry encourages producers to obtain milk with low SCC via additional payments [8] .…”