RESUMO
Data of different body measurements and some economic traits were obtained from 112 buffaloe cows belonging to Al-Aml governmental farm [Adaah] in Beheira Governorate. It was observed that body measurements and skin thickness were highly significantly [P = 0.01] affected by age at first calving. Moreover, there was a highly significant effect of lactation order on all body measurements. On the other hand, there was pronounced variations in body measurements due to lactation order. Stage of lactation has also a highly significant [P = 0.01] effect on all body measurements and skin thickness. Except for midstage of lactation, all body measurements except heart girth and chest depth were found to be increased as lactation advanced. In addition, heart girth, pelvic width and skin thickness at the neck region showed significant and higher correlations with the average daily milk yield [0.27, 0.30 and 0.25, respectively]. However, chest depth and height at withers were low negative non-significantly correlated with the average daily milk yield
Assuntos
Animais , Leite/metabolismoRESUMO
A total of 112 individual observations were obtained from buffalo cows of different ages belonging to Al-Aml Governorate farms [Adaah] in Beheira Governorate. Age at first calving had a highly significant effect [P = 0.01] on circumference of udder, overall udder size and distance between fore and rear teat and length and diameter of fore and rear teats. All udder and teat measurements, except depth of forequarter, depth of udder and distance between fore teats, were found to be highly significantly [P = 0.01] affected by lactation order. Stage of lactation had significant and highly significant effect on udder and teat measurements under investigation except on depth of forequarter, depth of udder, distance between fore and rear teats and diameter of fore teats. In the first and fifth lactations, there were no significant phenotypic correlations between daily milk yield and most of udder and teat measurements except between daily milk yield and depth of forequarter in first lactation [0.62] and daily milk yield and diameter of fore teats in the fifth lactation [0.77]. Moreover, in second, third, fourth and sixth and later lactations, there were highly significant phenotypic correlations between daily milk yield and most of udder and teat measurements