Equations for assessment of lean meat content in pig carcasses on slaughter line | Enačbe za ocenjevanje deleža mesa v trupih prašičev na liniji klanja

English. Assessment of meatiness on slaughter line based upon measurements of explanatory variables and equation for lean meat content in which measurements are entered. Equation is evaluated using data from preceding dissection of sufficient number of carcasses. Considering EU legislation for computation of new formula, EU-reference and partial dissection were used, as well as double-regression as a statistical method. Sixty-one carcasses were dissected according to EU-reference method, and the sample for partial dissection included 130 carcasses. Equations for lean meat content for method with apparatus Hennessy Grading Probe (HGP) and two-point method were computed. Equation for HGP met criterion for residual standard deviation (RSD) of 2.5 (2.43), so it is convenient for introduction of HGP method on the slaughter line. Substitutive two-point method did not reach 2.5 for RSD. Nevertheless, current equation DM5 for two-point method still sufficiently estimate the lean meat content. Prior to the introduction of the new method for HGP on slaughter line, verification is needed.

Slovenian. Ocenjevanje mesnatosti prašičev na liniji temelji na meritvah pojasnjevalnih spremenljivk in predhodno določene enačbe za odstotek mesa, v katero vstavimo meritve. Enačbo določimo na podlagi predhodnega razseka zadostnega števila klavnih trupov. Prilagojeno zakonodaji EU smo se pri izračunu nove enačbe poslužili kombinacije EU-referenčnega in delnega razseka, pri statistični obdelavi pa uporabili dvojno regresijo. Izvedli smo popolni razsek na 61 in samo delni razsek na 130 klavnih trupih prašičev. Določali smo enačbi za ocenjevanje odstotka mesa za metodo z aparatom Hennessy Grading Probe (HGP) in za ročno dvotočkovno metodo. Enačba za aparat HGP je zadostila potrebnemu standardnemu odklonu ostanka (RSD) pod 2,5 (2,43) in je primerna za uvedbo metode HGP na linijo klanja. Nadomestna ročna metoda se ni približala vrednosti 2,5 za RSD, pač pa še vedno zadovoljivo ocenjuje mesnatost sedanja enačba DM5. Pred uvedbo nove metode z aparatom HGP je potrebna še preveritev na liniji klanja.