Factors limiting milk production increase on private farms in Croatia

Ustanovljene su zakonitosti u razvoju gospodarstava specijaliziranih za proizvodnju mlijeka. Istražene su značajke takvih gospodarstava u Hrvatskoj. Broj gospodarstava na kojima se proizvodi mlijeko u Hrvatskoj smanjuje se zbog dobne strukture vlasnika. Da bi se povećala i specijalizirala proizvodnja mlijeka na gospodarstvima u Hrvatskoj, potreban je znatan kapital. Povećanje gospodarstava otežavaju i rezultati uzgojne politike i umjetne inseminacije. Ako povećanje gospodarstava bude ovisilo o financijskom uspjehu samih gospodarstava io vlastitu investiranju, uz sadašnje uvjete proizvodnje, proizvodnja mlijeka za tržište u Hrvatskoj bit će nedostatna zbog niske proizvodnosti i gospodarske nedjelotvornosti. Dok je tržište mlijeka nerazvijeno i dok je državna politika neučinkovita, ne može se očekivati djelovanje gospodarskih zakonitosti koje će poticati okrupnjenje gospodarstava, naglo povećanje proizvodnje mlijeka po kravi i proizvodnosti rada.The regularity in the development of specialized dairy farms has been established. The characteristics of those farms in Croatia were investigated. The number of private dairy farms in Croatia is decreasing owing to farmers\u27 age. Significant investment is needfull in order to increase and specialize the production of milk on farms in Croatia. The breeding policy and artificial insemination results interfere with the increase of farms\u27 size. If the increase of farms\u27 size in Croatia should depend on their proper financial support and investment at actual production circumstances, the market milk production would be insufficient due to low productivity and economic inefficiency. Undeveloped milk market and an inadequate State policy cannot activate economic lows that would stimulate farms\u27 size increase rapid enlarging of milk production per cow and increase of labour productivity

A NEW REPORT ON THE CHANGES IN TITRATE OF THE OESTROUS HORMONES IN THE COURSE OF PREGNANCY IN COWS

The object of the experiment was to investigate the total concentration of estrogen hormones in the cows plasma during pregnancy (from 40 till 284 days). The cows were distributed in 4 groups (tab. 1) and average total concentration was from 138,86 (1st group) till 646 ng% (4th group). Significant differences were found between all groups with the exception of the 2 nd and 3 rd groups. The level of estrogen hormones during pregnancy is presented by the following equation (fig 2): y = 328,1391 - 4,2030 + 0,0207 x