Results 31 to 40 of about 2,179,464 (293)
Effect of dry period length on milk yield over multiple lactations [PDF]
Journal of Dairy Science, 2017 Shortening or omitting the dry period (DP) can improve the energy balance of dairy cows in early lactation through a decrease in milk yield after calving. Little is known about the effect of a short or no DP on milk yield over multiple lactations. Our objectives were (1) to assess the effect of DP length over multiple lactations on milk yield, and (2 ...
Kok, A. +6 more
openaire +3 more sources
Genetics and Molecular Biology, 2011 The objectives of this study were to estimate the genetic parameters for milk yield unadjusted and adjusted for days in milk and, subsequently, to assess the influence of adjusting for days in milk on sire rank. Complete lactations from 90 or 150 days of
Fernando Baldi +6 more
doaj +1 more source
Productive performance of indigenous and HF crossbred dairy cows in Gondar, Ethiopia [PDF]
Veterinary World, 2014 Aim: To study the magnitude of variation in lactation length (LL), lactation milk yield (LMY) and peak-yield (PY)due to genetic and non-genetic cases in indigenous and crossbred cattle reared under private dairy unit in and around Gondar, Ethiopia ...
Niraj Kumar +3 more
doaj +1 more source
Animal, 2019 The transition period is the most critical period in the lactation cycle of dairy cows. Extended lactations reduce the frequency of transition periods, the number of calves and the related labour for farmers.
A. Kok +6 more
doaj +1 more source
PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF FRIESIAN CATTLE UNDER ASSIUT ENVIRONMENTAL CONDITIONS [PDF]
Assiut Veterinary Medical Journal, 2018 Environmental factors such as animal origin, parity, year of calving and season of calving affect productivity. This work focused on the study of the effect of these factors on milk yield and reproductive traits of Friesian cows raised under Upper Egypt ...
HASSAN A.H +3 more
doaj +1 more source
Genetic parameters and trends for lactation length in the first three lactations of Holstein cows [PDF]
Archives Animal Breeding, 2012 Abstract. Calving records from the Animal Breeding Center of Iran collected from January 1986 to December 2007 and comprising 492424 calving events of Holsteins from 1413 dairy herds were analysed using linear animal models to estimate genetic parameters for lactation lengths in the first three lactations of Holstein cows.
openaire +2 more sources
Genetic profile of total body energy content of Holstein cows in the first three lactations [PDF]
, 2005 Weekly total body energy content (TBEC) was calculated for 444 Holstein cows in their first 3 lactations. These calculations were based on body lipid and protein changes predicted from weekly changes in body condition score and live weight of each cow ...
Banos, G +6 more
core +1 more source
SOME FACTORS AFFECTING MILK YIELD AND LACTATION LENGTH IN NILI RAVI BUFFALOES [PDF]
Pakistan Veterinary Journal, 2007 Effects of parity, lactation length, calving season, calf sex and service period on milk yield for 426 records in 134 Nili Ravi buffaloes maintained at the National Agricultural Research Center, Islamabad Pakistan during 1988-2004 were evaluted.
M. AFZAL, M. ANWAR AND M. A. MIRZA
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Lactation Length in Days by Calf Gender within Breed and Lactation.
, 2016 Lactation Length in Days by Calf Gender within Breed and Lactation.
Melanie K. Hess (3179976) +2 more
core +1 more source
STUDY REGARDING THE INFLUENCE OF PARITY ON MILK PRODUCTION TRAITS IN ROMANIAN BLACK AND WHITE COWS
Scientific Papers Animal Science and Biotechnologies, 2023 The aim of this paper was to establish the way parity had an influence on the milk production and lactation length in Romanian Black and White cows from the Didactical Farm Timişoara.
SIMONA BAUL +6 more
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