كليدواژه :
كتوز , فارس , ketosis , دامپروري , Shahrekord , گاوداري ها , Subclinical , كتوز غير باليني , شهركرد
چكيده لاتين :
The prevalence of bovine subclinical ketosis amongst 400 dairy Holestin cows in 23 herds was studied during June to October 2001 in Shahrekord. In this study 400 milk samples and 234 urine samples with the modified Rotheraʹs test were evaluated for qualitative assay of ketone bodies in milk and urine, during first 60 days of lactation. The relation between sub clinical ketosis with cows age, parity, milk production and weeks in the 1st - 8th postcalving weeks, were obtained with X 2, G 2, t, f, Z, HSD and Fisherʹs exact tests, from 400 milk samples of examined for ketolactia 39 (9.8%) and from 234 urine samples examined for ketonuria, 54 (20.5%) samples were found positive, difference was statistically significant (a = 0.01). There was an apparent trend of increasing prevalence of sub clinical ketosis with increasing age. However, only the difference between the 2-3 years old cows with the 4-5 years old cows, the 5-6 years old cows and the 6-7 years old cows, were statistically significant (a = 0.05). Also with increasing parity there was an apparent trend of increasing prevalence of subclinical ketosis. However, only the difference between the parity - 1 with the parity - 3 and the parity - 4 were statistically significant (a = 0.05). There was an statistical relation between prevalence of sub clinical ketosis and milk production (a =0.01). There were no significant differences in prevalence of subclinical ketosis between different weeks in the 1st - 8th postcalving weeks (a =0.05).
