Deconstructing Milk Yield and Composition During Lactation Using Biologically Based Lactation Models [PDF]
Journal of Dairy Science, 2004 A recently developed biological model of lactation described changes in daily milk yield throughout lactation as the result of 3 processes, secretory cell differentiation, cell death, and secretion rate per cell. This paper extends the model to describe the production of milk components (fat, protein, lactose, and water) throughout lactation by ...
G E Pollott, G E Pollott
exaly +4 more sources
Economic Weights for Genetic Improvement of Lactation Persistency and Milk Yield [PDF]
Journal of Dairy Science, 2009 This study aimed to establish a criterion for measuring the relative weight of lactation persistency (the ratio of yield at 280 d in milk to peak yield) in restricted selection index for the improvement of net merit comprising 3-parity total yield and total lactation persistency. The restricted selection index was compared with selection based on first-
K Togashi, C Y Lin
exaly +3 more sources
Dynamics of correlation coefficients of economic and productive characteristics depending on the age of cows [PDF]
E3S Web of Conferences, 2021 In 2002, a new Ural type of black-and-white breed was officially registered. Animals of this type have high productivity indicators, but at the same time there is a decrease in the productive longevity of the breeding stock.
Harlap S.Yu. +4 more
doaj +1 more source
The interrelation of holstein black pied cattle’s productive qualities by lactation [PDF]
BIO Web of Conferences, 2022 Holsteinized Russian black pied cattle of the Ural type are bred in the Sverdlovsk region, which is represented by large highly productive animals with a high genetic potential of productivity.
Gorelik O.V. +4 more
doaj +1 more source
Effects of ecotrofin™ on milk yield, milk quality and serum biochemistry in lactating goats [PDF]
Journal of Animal Physiology and Animal Nutrition, 2021 AbstractA nutritional supplement (Ecotrofin™, by Vetoquinol Italia S.r.l) recommended in ruminants feeding to strengthen the physiological condition and improve digestive performance was tested in 20 pluriparae grazing goats divided in two groups (control and treated) to assess its possible effects on milk yield and quality and to assess eventual ...
Musco N. +8 more
openaire +3 more sources
THE EFFECT OF GRADING UP ANKOLE CATTLE OF BURUNDI WITH SAHIWAL ON MILK PRODUCTION PERFORMANCE OF COWS [PDF]
Journal of Animal and Poultry Production, 2000 Total of 510 lactation records, representing five successive parities, were collected on 102 cows (20 Ankole and 82 Sahiwal x Ankole crosses) to study the effect of grading up Ankole cattle of Burundi with Sahiwal breed on both total milk yield and ...
H. Nimenya, S. Rashwan, M. Anous,
doaj +1 more source
Genetic parameters of milk and lactation curve traits of dairy cattle from research farms in Thailand [PDF]
Animal Bioscience, 2022 Objective This study was aimed to estimate the genetic parameters, including genetic and phenotypic correlations, of milk yield, lactation curve traits and milk composition of Thai dairy cattle from three government research farms. Methods The data of 25,
Santi Pangmao +2 more
doaj +1 more source
Variation in Lactation Yield of Milk Constituents
Journal of Dairy Science, 1966 Abstract The lactation production of milk, milk fat, solids-not-fat (SNF), and total solids from cows of six breeds in seven Midwest states was used to investigate gross environmental effects on these traits and to consider correlated responses due to selection for a single trait.
R P, Blanchard, A E, Freeman, P W, Spike
openaire +2 more sources
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
Evaluation of production performance of Binjharpuri cattle of Odisha
Indian Journal of Animal Sciences, 2023 Binjharpuri, a dual purpose indigenous breed of Odisha is commonly reared for its various advantages, viz. optimum milk production in low input management system, excellent draft ability in hot humid climate condition and heat resistance ability. In the
NAYAK S +6 more
doaj +1 more source