رEvaluation some of environmental factors on potential production for Khouzestan dairy Buffaloes

In this study، the effect of environmental factors of production traits (milk yield، fat yield and fat percentage) were studied. Data collected from 129 buffaloes herd from Khuzestan province by Animal Breeding Organization of Iran during 13 years (1995-2008). Using linear model environmental factors on age at calving and season of calving analyzed by GLM procedure in SAS software. Lactation length considered as a covariance in model. The effect of all factors those studied were significant (P<0. 01). Means and standard errors of milk and fat yield and fat percentage were 2174. 56±7. 82kg، 138. 80±0. 62kg، 6. 28±0. 01% respectively. Buffalo calving in spring showed the highest milk yield and fat yield and highest fat percentage was showed in spring. Buffalo calving in 11 age was showed the highest milk yield and fat yield and the highest of fat percentage was showed in 2 age at calving.