Analysis of sow fertility | Analiza reprodukcijskega ciklusa pri svinjah
2010
Urankar, J., Ljubljana Univ. (Slovenia). Biotechnical Fac., Zootechnical Dept. | Malovrh, S. | Kovac, M.
In the paper, correlations between fertility traits and non-productive days are evaluated. Data obtained within Slovenian farms for year 2009 were analyzed. Correlations between piglets weaned per sow per year with number of piglets per litter or number of litters per sow are high (r = 0.82, r = 0.87 respectively). High and negative correlation is also between piglets weaned per sow per year and female days per litter. Correlation between female days in gilts and sows (r = 0.36) suggests that breeders with problems whit gilts do not correct results in later parities. Similarities with successful and unsuccessful reproduction cycle can be expressed (r = 0.60). Breeders with many non-productive days in successful cycle also cull too late. The production costs were from 30 to 160 EUR per weaned piglet.
显示更多 [+] 显示较少 [-]