Milking with voluntary milking system (VMS) and the impact on the physiology of milk release

Cilj diplomskega dela je ugotoviti vpliv mlečnega robota na fiziologijo sproščanja mleka in ugotoviti, ali obstajajo vplivi četrti, zaporedne laktacije ter vpliv stadija laktacije na preučevane lastnosti količine mleka, prevodnosti, maksimalnega pretoka ter nizkega pretoka. Namen naloge je tudi ugotovitev morebitnih korelacij med preučevanimi lastnostmi. V februarju 2010 smo opazovali 75 krav molznic v laktaciji. Ugotovili smo, da ima vpliv četrti signifikanten vpliv na bistveno višji donos mleka (kg), višje izmerjen maksimalni pretok in višje izmerjen nizek pretok v zadnjih četrtih. Nadalje je bilo ugotovljeno, da ima vpliv zaporedne laktacije vpliv le na količino mleka (kg), ugotovljen je bil tudi vpliv stadija laktacije na preučevane lastnosti.The aim of the thesis is to determine the effect of the VMS on the physiology of milk release and determine, whether there are effects of quarters, parity number and lactation stage on the studied properties of the milk yield, conductivity, maximum flow and low flow. The purpose of the thesis is also to identify possible correlations between the studied properties. In February 2010 we observed 75 cows in lactation. We found, that the impact of the quarter has significant impact on higher milk yield (kg), higher measured maximum flow and higher measured low flow in hindquarters . It was further found, that the effect of parity effect only on the milk yield (kg), on other studied properties has no influence. We discovered also the influence of lactation stage on the studied properties