Merging and characterising phenotypic data on conventional and rare traits from dairy cattle experimental resources in three countries [PDF]
, 2012 peer-reviewedThis study set out to demonstrate the feasibility of merging data from different experimental resource dairy populations for joint genetic analyses.
Coffey, M.P. +15 more
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Cow, farm, and herd management factors in the dry period associated with raised somatic cell counts in early lactation [PDF]
, 2008 This study investigated cow characteristics, farm facilities, and herd management strategies during the dry period to examine their joint influence on somatic cell counts (SCC) in early lactation.
Browne, W. J. +10 more
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ACCURACY OF MILK YIELD ESTIMATION IN DAIRY CATTLE FROM MONTHLY RECORD BY REGRESSION METHOD [PDF]
, 2009 This experiment was conducted to estimate the actual milk yield and to compare the estimation accuracy of cumulative monthly record to actual milk yield by regression method.
Johari, S +3 more
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The Indian Journal of Animal Sciences, 2019 Lactation yield (LY) of dairy animals have high relationship with peak yield and test day milk yield. The present study was carried out for prediction of 305 days lactation yield based on peak yield and test day milk yield. Data on 384 first lactation test day milk yield records of crossbred cattle maintained at GADVASU dairy farm over a period of 25 ...
NISHA SHARMA +6 more
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The influence of THI values at different periods of lactation on milk quality and characteristics of lactation curve [PDF]
Journal of Agricultural Sciences (Belgrade), 2010 The experiment included 90 cows. Cows were chosen according to the time of calving, so that the first third of lactation occurred during the summer in 30 cows (G1), the second third of lactation occurred during the summer in 30 cows (G2), and in the ...
Cincović Marko R. +4 more
doaj +1 more source
A Forage Allowance by Forage Type Interaction Impacts the Daily Milk Yield of Early Lactation Dairy Cows [PDF]
, 2023 We tested for a forage allowance effect on the milk yield of early lactation dairy cow herds grazing swards sown with perennial ryegrass (Lolium perenne L.), white clover (Trifolium repens L.) and plantain (Plantago lanceolata L.) relative to perennial ...
Keith G. Pembleton +11 more
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PHENOTYPIC AND GENETIC CORRELATIONS BETWEEN FIRST LACTATION MILK YIELD AND SOME PERFORMANCE TRAITS IN SAHIWAL CATTLE [PDF]
Pakistan Veterinary Journal, 2004 Data on 8948 pedigree, breeding and performance records of a purebred herd of Sahiwal cattle maintained at the Livestock Experiment Station Jahangirabad district Khanewal (Pakistan) during the period 1939-98 were analysed.
K. Javed, M. Abdullah1 , M. Akhtar2 and M. Afzal3
doaj
Journal of Dairy Science, 2001 The objective of the experiment was to examine, using indirect calorimetry, the effects of milk yield and stage of lactation on the response in milk and body tissue energy, and heat production, to a reduction (decrement) in nutrient intake (assessed as metabolizable energy intake).
R M, Kirkland, F J, Gordon
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Efficiency of Different Selection Criteria for Persistency and Lactation Milk Yield [PDF]
Journal of Dairy Science, 2004 A conversion formula was developed to convert the genetic covariance matrices of daily yields and of random regression coefficients between 305-d and 335-d production periods under a random regression test day model. Five selection criteria were compared in terms of genetic improvement in persistency and lactation milk: 1) lactation estimated breeding ...
K, Togashi, C Y, Lin
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, 2023 Seasonal heat stress and metabolic disorders during mid-lactation are the main factors limiting production in Holstein cows, and several proteins and molecules involved in metabolic pathways are altered in response to stress.
Yongqiang Li +11 more
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