بررسي عوامل تاثير گذار بر تلفات حيواني در واحدهاي مرغداري گوشتي كشور

A Study of the Factors Affecting Mortality Rate in Broiler Farms in Iran

Broiler fann industry is a most profitable operation in the world but in Iran it is faced with a high mortality rate. To find out factors affecting mortality rate in this industry, a national research project was carried out. It was based on a survey research method; a systematic sampling technique being employed to identify the first highest provinces in terms of broiler production capacity. These provinces ran a 50% of overall capacity in broiler production at a national level. The survey questionnaire was designed based on literature andthen its face-validity and reliability calculated. A sample of200 broiler farms wasconsidered as the sample for interview. Theresults showed thatthe highest mortality rate of 20.77% and the lowest (6.84%) prevait in Tehran and Mazanderan provinces, respectively. Theresults also showed that factors such as fann size, house preparation for rearing period, disinfection pools, house ventilation, presence hours of manager onthe farm, source of feed supply, physical feed form, rearing periods during the year, and time lapse between two rearing periods, are the affecting Factors in mortality rate. Some practical Suggestions are presented inthe paper showing how to prevent ordiminish mortality rate.