Open AccessWater Resources and Dry Matter Production for Livestock in Northern Nigeria
Author(s) -
J. A. Ibeawuchi
Publication year - 2021
Publication title -
nigerian journal of animal production
Language(s) - English
Resource type - Journals
ISSN - 0331-2062
DOI - 10.51791/njap.v14i.2606
Subject(s) - ice calving , lactation , zoology , livestock , milk production , dry matter , biology , yield (engineering) , pregnancy , ecology , genetics , materials science , metallurgy
A total of 141 lactation records from 70 F, Friesian d x Bunaji & cattle maintained at the National Veterinary Research Institute's dairy farin, Vom, from 1970 - 1975 was utilized. Measurements were made of milk production traits of economic importance, Average milk yield was 1694 kg in 258 days. Mean 305 - day yield was 1896 kg. The third and fourth lactations were superior to the first and second (P 0.05). Peak production occurred at the fourth lacta tion when animals were 67 months old. Age at first calving averaged 29.7 months. Mean dry period and calving intervals were 64 and 331 days respectively. First calvers were non-significantly more persistent than older cows (P >0.05). Management practices essential for increased milk production and shorter calving intervals were suggested.