Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(1), 83-100 | DOI: 10.11118/actaun201159010083

Exploratory analysis of dynamics of frequency distribution of raw cow milk quality indicators in the Czech Republic

Oto Hanuš1, Libor Janů1, Jens Schuster2, Josef Kučera3, Marcela Vyletělová4, Václava Genčurová4
1 Research Institute for Cattle Breeding Rapotín, Výzkumníků 267, 788 13 Vikýřovice, Czech Republic
2 Landeskontrollverband Sachsen-Anhalt, Halle, Germany
3 Czech Fleckvieh Breeders Association, Horní 28, 591 01 Žďár nad Sázavou, Czech Republic
4 AgroResearch Rapotín, Výzkumníků 267, 788 13 Vikýřovice, Czech Republic

A consistent link of the raw milk quality (RMQ) to the farmer price is essential. The aim was to analyse the properties of milk quality indicators (MQIs) and propose a new synthetic relative MQI (SQSM) from among various individual MQIs. SQSM could serve for consistent inclusion each quality change into the price. The paper was focused on exploratory analysis (normality (N) testing of files of MQIs). On the basis of the results, the MQIs were divided into two groups without and with necessity of original data transformation (TRN). Log and Box-Cox TRNs were tested in terms of possibilities of the files approach to the normal data frequency distribution (FD). The compositional MQIs deviated less and health and hygienic MQIs more from normal FD in original data (P < 0.05). The TRNs approached the data files to N very markedly in health and hygienic MQIs. The synthesis of various values of MQIs into SQSM was proposed. SQSM values were derived from model file of real data about MQIs and validated for use at farmer milk price modifications by the normality FD test. 33.3% of month SQSM files were normal (P > 0.05), the other were very close to the N with negligible deviations. The useability of the SQSM system for the balancing of raw milk purchase price premiums and penalties was tentatively confirmed.

Keywords: dairy cow, raw milk, bulk sample, milk quality indicator, exploratory analyse, data frequency distribution
Grants and funding:

Supported by the research projects NAZV QF 4003, INGO LA 09030 and MSM 2678846201 and by activities of National Reference Laboratory for Raw Milk in Rapotín as well.

Received: August 9, 2010; Published: July 10, 2014  Show citation

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Hanuš, O., Janů, L., Schuster, J., Kučera, J., Vyletělová, M., & Genčurová, V. (2011). Exploratory analysis of dynamics of frequency distribution of raw cow milk quality indicators in the Czech Republic. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 59(1), 83-100. doi: 10.11118/actaun201159010083
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