Open AccessA STUDY OF LACTATION CURVES OF IMPORTED FRESIAN CATTLE IN A TROPICAL ENVIRONMENT
Author(s) -
JA Ibbawuchi
Publication year - 2021
Publication title -
nigerian journal of animal production
Language(s) - English
Resource type - Journals
ISSN - 0331-2062
DOI - 10.51791/njap.v13i.2408
Subject(s) - lactation , culling , zoology , milk production , biology , veterinary medicine , geography , herd , pregnancy , medicine , genetics
In 586 .iortrial laciabons of 150 Friesian cattle maintained at the National Veterinary' Research institute, Vom, from 1968 to 1983. Maximum milk production ,was attained in the fifth week of lactation. The fourth and sixth lactation curves showed superiority over the first, second, third and fifth. The curves apparently indicate that culling of unproductive animals before the 6th lactation could be economically unreasonable.