Conference paper
INTENSITY OF PRODUCTIVITY AND EVIDENCE OF PROLIFICACY IN COUNTRY HYBRID AND PUREBRED SWEDISH WHITE IMPROVED SOWS IN BJELOVAR REGION
Tomislav Balenović
; Veterinarski fakultet, Zavod za stočarstvo, Zagreb, Republika Hrvatska
Marijan Sviben
; Veterinarski fakultet, Zavod za stočarstvo, Zagreb, Republika Hrvatska
Zvonimir Sigl
; O.O.K., Kooperacija R.O. "5.maj", Bjelovar, Republika Hrvatska
Abstract
From 1976. to 1981. evidence was kept of ihe dates of services and farrowings, the number of farrowed piglets and liveborn piglets per litter of country hybrid sows in the region of the organization 'Fifth May' - Bjelovar. At the same time data were kept for Swedish white improved sows procured from a large pig farm in order to improve the production of piglets for fattening in cooperation. The data enabled us to calculate the duration of in-pig periods, intervals between farrowing and conception and interfarrowing periods used to measure the intensity of productivity. We came to the conclusion that country hybrids and Swedish White improved sows on country farms hardly differ in the intensity of production, The differences, we have noted arose from the various duration of intervals between farrowing and conception. Higher prolificacy of Swedish White with the methods of raising maintained on the large pig farm where the females were procured and the criteria applied by the selection of females.
Keywords
Hrčak ID:
162479
URI
Publication date:
21.11.1992.
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