Published in Scientific Papers. Series D. Animal Science, Vol. LXVI, Issue 2
Written by Andrіі ZOLOTAROV, Victor PISKUN, Igor SEDUYK, Svetlana ZOLOTAROVA, Lyudmyla BERESTOVA, Yuriu KRAVCHENKO
The article presents data on the influence of paratypical factors on the milk productivity of dairy cows in different regions of Ukraine on farms with different methods of keeping animals - tethered and loose ones. In order to more accurately determine the impact, a multi-criteria analysis was conducted by 10 indicators. When comparing untethered and tethered methods of keeping dairy cows, the advantage of the loose method was revealed; its objective function according to the considered criteria was the smallest one of 0.1391. This indicator appeared to be 1.1553–5.3394 times worse for the tethered method. Also, to establish the correlation between paratypical factors - daily yield of standardized milk, diet overall nutrition value, crude protein content, undegradable protein content, daily ambient temperature and air humidity, mathematical models were developed and analyzed: linear, incomplete quadratic and full quadratic ones.
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