STUDIES ON FRIESIAN CATTLE IN EGYPT I.ENVIRONMENTAL FACTORS AFFECTING MILK PRODUCTION

Farrag,, F. H. H.; El-Barbary, A. S. A.; Abdel-Glil, M. F.; Hussein, K.

doi:10.21608/jappmu.2000.259807

STUDIES ON FRIESIAN CATTLE IN EGYPT I.ENVIRONMENTAL FACTORS AFFECTING MILK PRODUCTION

Document Type : Original Article

Authors

¹ Dept. of Animal production, Fac. of Agric., Mansoura Univ., Mansoura Egypt.

² Dept . of Animal production and Fish, Fac. of Agric .Alexandria Univ. Alexandria, Egypt.

³ Dept. of Animal breeding, Animal production Research Institute, Ministry of Agriculture, Egypt.

10.21608/jappmu.2000.259807

Abstract

Total of 1797 records of 765 cows raised in El-Shazly private farm . located in Shobratana – Basyon , Gharbia , Governorate were collected during period from 1985 to 1993 to study the effect of some environmental factors on milk production of Friesian Cattle .
The result obtained could be summarized in the following .
Parity had non- significant effect on all traits study except the effect on 90 days cumulative milk yield was highly significant (P< 0.01) .Year of calving and significant ( P< 0.01 ) effect on different studied traits .
Season of calving had highly significant (P< 0.01) effect on cumulative 90 and 180 days milk yield, and only significant (P< 0.01) effect on total milk yield , lactation period and on the five method used for estimating persistency of lactation .But it is had non significant effect on both 305 and 270 days milk yield .