Acta Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(3), 791-801 | DOI: 10.11118/actaun201664030791

Development to Ensure of the Result Reliability of Production Indicators in the Milk Recording During its Computerization

Pavel Hering1, Pavel Kopunecz2, Oto Hanuš1, Martin Tomáška3, Marcela Klimešová1, Radoslava Jedelská1, Jaroslav Kopecký1
1 Dairy Research Institute, Ltd., Ke Dvoru 12a, 160 00 Praha 6, Czech Republic
2 Czech-Moravian Breeders Corporation, Inc., Benešovská 123, 252 09 Hradištko, Czech Republic
3 Dairy Research Institute, JV, Dlhá 95, 010 01 Žilina, Slovak Republic

Milk recording (MR) is an essential breeder measure. Results are important for inheritance check. The occurrence of errors in the data may compromise the efficiency of breeding of dairy cows. The aim was possibility to reduce the incidence of MR database errors. Analyses of frequency distribution of MR data deviations from different sources and estimations of limits of difference acceptability in milk recording were performed. The results of MR control days of flowmeter in parlor (DMY) were paired to the AVG7 results (average for 7 days) from the same flowmeter (n = 16,247, original recordings of complete lactations). The individual differences in milk yield indicators were calculated between successive MR control days (DMY - R, monthly interval, the reference value (R) = previous DMY) for MR data file. A statistically significant correlation coefficient (AVG7 and DMY) was 0.935 (P < 0.001) and was higher in comparison to the previous assessment under AMS conditions (automatic milking system; 0.898; P < 0.001). This means that 87.3% of the variability in the milk yield values for MR (DMY) can be explained by variations in the AVG7 values and vice versa. Difference tests confirmed significant differences (P < 0.001) 0.76 and 0.55 kg between DMY (in MR) and AVG7 for original and also refined data file. Mentioned differences, although statistically significant, correspond only to 2.96 and 2.15% relatively. The use of multi-day milk yield average from the electronic flowmeter is an equivalent alternative to the use of record from one MR control day. Results are used in MR practice.

Keywords: cow, raw milk, milk yield, fat, protein, somatic cell count, milked cattle breeding
Grants and funding:

The results were obtained by methodical development with institutional support MZe RO1415 and APVV-0357-12.

Prepublished online: July 4, 2016; Published: July 1, 2016  Show citation

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Hering, P., Kopunecz, P., Hanuš, O., Tomáška, M., Klimešová, M., Jedelská, R., & Kopecký, J. (2016). Development to Ensure of the Result Reliability of Production Indicators in the Milk Recording During its Computerization. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(3), 791-801. doi: 10.11118/actaun201664030791
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