بازدهی اقتصادی و بیولوژیکی

In this study, production, reproduction, population, management and economic parameters resulted from recording of 12 industrial dairy farms in Chaharmahal-va-Bakhtiari province with herd size 20 to 250 and a total of 1240 head of Holstein cows in a cycle of production, during 2010 to 2012 were used for cost-benefit analysis and determination of the economical and biological efficiency values. Revenue was derived from milk, live weight, breeding animals and cull animals. Costs were included to feed, management and labor, health and veterinary, fuel and energy, interest rate and fixed. The results showed that the annually average profits per cow were ranged from 15206843 to 25921834 Rials (507 to 864 US$), revenue to cost ratio were 1.18 to 1.27 and biological efficiency ranged from 57.43 to 65.38 and all of them increased by milk production level. In general, the sale of milk yield, animal live weight and stock animal accounted the highest proportion of total revenue, respectively and the proportion of milk yield from total revenue increase by increasing milk level. The cost of feeding, interest rate, management and labor, health and veterinary, fixed and energy had the highest percent of total cost, respectively and the proportion of feeding cost increased with level of milk yield. The estimated cost- benefit analysis and efficiencies obtained in this study could be used to assist researchers, macro policy makers, determination of dairy cattle strategy and farmers in making decisions that will improve sustainability and also farm profitability.