ПРОУЧВАНЕ НА КОРЕЛАЦИИТЕ МЕЖДУ РАЗЛИЧНИ ПОКАЗАТЕЛИ ЗА ОЦЕНКА НА МЛЕЧНИ ФЕРМИ | STUDY ON THE CORRELATIONS BETWEEN DIFFERENT PARAMETERS AND EVALUATION OF DAIRY FARMS

Bulgarian. The aim of the paper is to study the correlation coefficients between the different parameters for evaluation of dairyfarms. It was investigated 17 dairy farms from different regions in Bulgaria. The coefficients of correlation were calculatedbetween: number of cows, status of the herds, milk productivity, content of protein and fatty substances in milk, serviceperiod, reproduction, health status, feeding, milking, hygiene, economics and management of farm. The coefficients of correlationwere cоmputed with SPSS 9.As a result of the study, it was found that with the increase in the number of cows, the economics and management alsoincrease; improved hygiene, microclimate, reproduction, feeding and management lead to an increase in average milk yield;with the increase in multiplicity of milking, fatty substances in milk reduce; the improvement of reproductive performanceof the animals leads to shorter service period; with an increase in farm hygiene the microclimate improves and others.

English. The aim of the paper is to study the correlation coefficients between the different parameters for evaluation of dairyfarms. It was investigated 17 dairy farms from different regions in Bulgaria. The coefficients of correlation were calculatedbetween: number of cows, status of the herds, milk productivity, content of protein and fatty substances in milk, serviceperiod, reproduction, health status, feeding, milking, hygiene, economics and management of farm. The coefficients of correlationwere cоmputed with SPSS 9.As a result of the study, it was found that with the increase in the number of cows, the economics and management alsoincrease; improved hygiene, microclimate, reproduction, feeding and management lead to an increase in average milk yield;with the increase in multiplicity of milking, fatty substances in milk reduce; the improvement of reproductive performanceof the animals leads to shorter service period; with an increase in farm hygiene the microclimate improves and others.