Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 1
Written by Constantin PASCAL, Alexandru Marian FLOREA, Ionică NECHIFOR, Costică CRISTIAN
Research aimed to enlighten the effect of age on milk production obtained from local goat populations. To limit the effect of some external factors on lactogen capacity the formed batches were maintained in permanent stabulation on the whole period of the respective lactation. Biological material belonged to local breed Carpatina, being represented by 7 batches differentiating by age from 2.5 years to 9 years, each of them being constituted by 10 females in lactation, all being subjected to the same experimental treatment. Evaluation of performances for milk production was based on some determinations accepted by experimental technique, using Nica method for lactation period and for period in which females were exclusively milked was applied the AT4 method respecting the technical specifications suggest by International Committee for Animal Recording. The obtained results were statistically processed by statistical analysis using REML (REstricted Maximum Likelihood) algorithm, which offers the obtaining of statistical estimating parameters in normal interval. Analyse of recorded performances with the occasion of applying of productive control highlight that at batch formed by females which have in the second and third lactation the age of four and five years was recorded a mean milk production higher with 14.38% and respectively 32% face to the ones in the first lactation. The obtained results are very important because, in Romania, the sector represented by goat rearing is into an advanced development and modernization stage as well regarding the applied technologies.
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