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Purpose: The results of measurements shows that the chest size is not enough accurate to establish the body mass of living animals in all development stages, therefore additional measuring of the trunk length was used to increase reliability of the estimate. Design/methodology/approach: During the test 30 fattened animals were considered and were weighed by electronic weighing device EC 2000. The trunk length (d) and the chest size (o) were measured simultaneously. The body mass (T) was calculated according to the equation: T = o x d / 50. By the statistical package SPSS 12.01. for Windows the basic statistics for the studied properties was calculated. By the t-test the calculated and the actually weighed body masses of animals were compared. Findings: On the young fattened cattle it was established that with 240 - 290 kg body mass, when the body form is most rectangular, the accuracy of calculation on the basis of measured body parts, is the greatest. The percentage difference between weighed and calculated body mass is only 0.06%, which is very accurate. Research limitations/implications: For wide applicability of measurement results on the living animals in all stages of growth it would be necessary in the equation for the calculation to include also the trunk size in the middle of the body and the size in the rear part. Practical implications: On small farms where the cost of purchase of the digital weighing device would be too great a burden, thus, measuring of the chest size at 3 cm behind the elbow joint, in the middle of the trunk (behind the last rib), and measuring of the size in the rear part of the body and the trunk length from the middle of the withers to the tail root are more appropriate. Originality/value: The animals which phenotypically feature cylindrical shape in the period of growth can be measured most simply in the front middle and rear part of the body and, then, their body mass can be determined very accurately on the basis of the data obtained.
Wydawca
Rocznik
Tom
Strony
47--50
Opis fizyczny
Bibliogr. 20 poz., rys., tab.
Twórcy
autor
autor
autor
autor
- Faculty of Agriculture, University of Maribor, Vrbanska 30, 2000 Maribor, Slovenia, marjan.janzekovic@uni-mb.si
Bibliografia
- [1] User's guide EC 2000, Tru-Test Limited, Auckland, 2003.
- [2] B. Mursec, F. Cus, J. Balic, Organization of tool supply and determination of cutting conditions, Journal of Materials Processing Technology 100 (2000) 241-249.
- [3] M. Cepon, M. Klopcic, K. Potocnik, S. Zgur, P. Dovc, Technical rules and description of methods for measuring and calculating production and other properties and methods for predicting genetic values for pure breed reproductive cattle in Slovenia Biotechnical Faculty, Zootechnical department, Domzale, 2006.
- [4] F. Cus, B. Mursec, Databases for technological information systems, Journal of Materials Processing Technology 157-158 (2004) 75-81.
- [5] B. Mursec, F. Cus, Integral model of selection of optimal cutting conditions from different databases of tool makers, Journal of Materials Processing Technology 133 (2003) 158-165.
- [6] J. Bergant, Cattle, sheep and goat breeding in Slovenia. University of Ljubljana, Biotechnical Faculty, Ljubljana 2000.
- [7] M. Janzekovic, B. Mursec, I. Janzekovic, Development of noninvasive method of measuring of heart rate in cattle, Proceedings of the 4th DAAAM International Conference on “Advanced Technologies for Developing Countries” Slavonski Brod, 2005, 523-528.
- [8] U. Zuperl, F. Cus, M. Milfelner, Fuzzy control strategy for an adaptive force control in end-milling, Journal of Materials Processing Technology 164-165 (2005) 1472-1478.
- [9] A. Ploj, B. Mursec, F. Cus, U. Zuperl, Characterization of machines for processing of waste materials, Journal of Materials Processing Technology 175 (2006) 338-343.
- [10] M. Janzekovic, B. Mursec, I. Janzekovic, Techniques of measuring heart rate in cattle, Technical Gazete 13 (2006) 31-37.
- [11] H. Kräußlich, Tierzuchtungslehre. Verlag Eugen Ulmer, Stuttgart (1994) 175-182.
- [12] M. Cepon, M. Janzekovic, M. Klopcic, K. Potocnik Dappled cattle breeding programme in Slovenia. Association of societies of dappled cattle of Slovenia, Ljubljana (2004) 11-16.
- [13] M. Janzekovic, B. Mursec, F. Cus, A. Ploj, I. Janzekovic, U. Zuperl, Use of machines for liquid manure aerating and mixing, Journal of Materials Processing Technology 162-163 (2005) 744-750.
- [14] S. Kogel, J. Utz, Wie gut eigenen sich Fleckviehbullen fur Gebrauchskreuzungen, Tierzuchter 40 (1988) 385-388.
- [15] N. Kunzi, G. Stranzinger, Allgemeine Tierzucht, Verlag Eugen Ulmer Stuttgart, 1993, 66-90.
- [16] N.C. Kadunc, Tests and demonstrations in physiology Faculty of Veterinary Science. Ljubljana (1993) 38-39.
- [17] D.J. Sheskin, Parametric and nonparametric statistical procedures, Chapman and Hall/CRC, USA, 2000, 32-33.
- [18] M. Kirchgessner, Tierernährung. DLG Verlag, 1997, 582.
- [19] SPSS 12.0 statistical procedures companion, Prentice Hall. New York, 2003.
- [20] B. Mursec, M. Janzekovic. F. Cus. U. Zuperl, Comparison of rollers after sowing of buckwheat, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 269-272.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BOS5-0019-0083