Original scientific paper
EFFECT OF SOME NONGENETIC FACTORS ON LACTATION OF COWS 3. Influence on persistency, lactation peak and time when lactation reaches the peak
Ivan Jakopović
; Poljoprivredni centar Hravtske- Stočarski selekcijski centar Zagreb, Zagreb, Republika Hrvatska
Abstract
Determination of persistency, lactation peak and the time when lactation reaches the peak was carried out from the lactation- curve data using transformations of basic Wood's model of lactation definition by gama function. The recived data obtained persistency (62,8681), peak of lactation (28,0844 kg) and time when lactation reaches its peak (5,2067 weeks) are as expected. By variance analysis his been determined the significance of all influencing factors. The significe has also been on influence of each factor chass on these parameters. Correlation among all the parameters and parameters a, b and c determining the shape of lactation curve was found.
Keywords
Hrčak ID:
162610
URI
Publication date:
28.7.1993.
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