engleski

Comparison of milk production traits by Istrian pramenka between conventional and organic systems in Slovenia

The aim of the present study was to determine differences of amount and composition of milk between conventional and organic systems in Istrian pramenka breed of sheep. Sum of the data included 838 conventional and 9238 organic samples of ewes´ milk. Each farm is classified as organic from the date of entering in organic production. Before that date farms didn´t show characteristics of organic production, therefore they were classified as conventional. The results of the present study included higher amount of morning (353.10 g) and evening milk (361.39 g) in conventional compared to morning (342.76 g) and evening milk (345.69) in organic system, significantly influenced by number of lactation (P<0.001), breeding system and breeder interaction (P<0.001). Higher content of fat in conventional system was significantly influenced by breeding system (P<0.05), breeding system and breeder interaction (P<0.001), number of lactation (P<0.01) and lactation length (P<0.001). Lower protein content in conventional system was influenced significantly by breeding system and breeder interaction (P<0.001), litter size (P<0.05) and lactation length (P<0.001). Content of lactose was higher in organic system (3.93%) compared to conventional system (3.84%) significantly influenced by breeding system (P<0.01) and number of lactation (P<0.001). According to results, differences between conventional and organic systems are the mostly influenced by breeder in Slovenia.

conventional system ; organic system ; milk composition ; Istrian pramenka

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