Economic values of the basic productive and functional traits of sheep from bulgarian dairy synthetic population
Slavova, Stanimira | Kalaydzhiev, Georgi | Krastanov, Jivko | Laleva, Staika | Popova, Yovka | Slavova, Petia | Petrović, Milan M.
The subject of the study was to estimate economic values of the main productive and functional traits of the sheep flock from Bulgarian dairy synthetic population, raised in the Agricultural Institute in Stara Zagora, Bulgaria. The collected data was processed by the Program EWSH2 for sheep, version 1.0.2., using a bio-economic model. The study covered a period of five years (2010-2014), i.e. five reproductive cycles, at semi-intensive productive system with one lambing per year. The following indicators were investigated: rate of profitability, marginal economic values (MEV) of the traits of great economic importance, and their relative economic weights (REV) in the sum of the absolute values of the standardized economic values. The rate of profitability including governmental subsidies is estimated (-25.63%). Milk yield stands out with the highest relative economic weight of 19.01, followed by the litter size per ewe (16.99) and live weight (13.72). The production lifetime of ewes has a relative value of 8.70 and conception rate – 6.21, which is significantly lower than the results obtained from similar studies in other European countries in the years. The values of the average survival rate till 24 hour after birth and from birth until weaning are almost equal and relatively low
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