doiSerbia

Composition of raw milk from conventional and organic dairy farming

Kučević Denis (Faculty of Agriculture, Department of Animal Science, Novi Sad)
Trivunović Snežana (Faculty of Agriculture, Department of Animal Science, Novi Sad)
Bogdanović Vladan (Faculty of Agriculture, Department of Zootechniques, Belgrade)
Čobanović Ksenija (Faculty of Agriculture, Department of Animal Science, Novi Sad)
Janković Dobrila (Faculty of Agriculture, Department of Animal Science, Novi Sad)
Stanojević Dragan (Faculty of Agriculture, Department of Zootechniques, Belgrade)

Possible differences between composition of raw milk due to dairy farming system (organic vs conventional) as well as seasonal variations were investigated. The samples were analysed during one year. A total of 6.782 samples of raw milk were collected (4.496 from organic farming). Dairy farms were located in the northern part of Republic of Serbia (Province of Vojvodina). The principle of analysis of raw milk samples was in accordance with the methodology by midinfrared spectrometry and flow cytometry. The fixed effect of system of farming and season (winter, spring, summer and fall) have shown a high statistical significance (P < 0.01) on all examined milk parameters except fat, total solids and somatic cell count, where the impact was slightly lower (P < 0.05). Significant difference wasn't found in number of bacterial colonies (P > 0.05). Composition of milk is also affected by a number of other factors, therefore it is recommended to involve factors such as nutrition of dairy cows, breed and farm management.

Keywords: milk composition, organic milk, conventional milk, dairy farming, Holstein-Friesian dairy cows

Projekat Ministarstva nauke Rpublike Srbije, br. TR 31086