Results 11 to 20 of about 44,292 (263)

The effect of lactation number, stage, length, and milking frequency on milk yield in Korean Holstein dairy cows using automatic milking system [PDF]

Asian-Australasian Journal of Animal Sciences, 2017
Objective The aim of the current study was to describe the relationship between milk yield and lactation number, stage, length and milking frequency in Korean Holstein dairy cows using an automatic milking system (AMS).
Mayakrishnan Vijayakumar, Ji Hoo Park, Kwang Seok Ki, Dong Hyun Lim, Sang Bum Kim, Seong Min Park, Ha Yeon Jeong, Beom Young Park, Tae Il Kim   +8 more
doaj   +1 more source

Mineral status and enteric methane production in dairy cows during different stages of lactation

BMC Veterinary Research, 2021
Background Lactating dairy cows are the greatest livestock contributor of methane, a major global greenhouse gas (GHG). However, good feeding management with adequate mineral intake can offers an effective approach to maintaining high levels of milk ...
Ľubomíra Grešáková, Monika Holodová, Małgorzata Szumacher-Strabel, Haihao Huang, Piotr Ślósarz, Janusz Wojtczak, Natalia Sowińska, Adam Cieślak   +7 more
doaj   +1 more source

Effect of parity and stage of lactation on feed sorting behavior of lactating dairy cows [PDF]

Journal of Dairy Science, 2011
The objectives of this study were to determine if feed sorting differs between primiparous (PP) and multiparous (MP) cows, if sorting changes from the period of peak lactation to peak dry matter intake (DMI), and whether feed sorting affects efficiency of production. Data on DMI, milk production, feed sorting (particle size of offered and refused feed),
T J, Devries, L, Holtshausen, M, Oba, K A, Beauchemin   +3 more
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Haemato-chemical and immune variations in Holstein cows at different stages of lactation, parity, and age

Veterinární Medicína, 2020
Physiological components are influenced by various factors. However, little is comprehensively understood about lactation, parity, and age-related blood profile changes in dairy cows.
Seong Bum Kim, Suk-Han Jung, Yoon Jung Do, Young-Hun Jung, Changyong Choe, Seungmin Ha, Ha Yeon Jeong, Ara Cho, Sang-Ik Oh, Eunju Kim, Jae Gyu Yoo, Suhee Kim   +11 more
doaj   +1 more source

Milk composition of Holstein cows: a retrospective study

Ciência Rural, 2018
: Worldwide, milk analysis is an satisfactory measurement of milk quality on dairy farms. Milk composition is the base for payment systems, so knowledge of its characteristics at different periods is essential for modern dairy producer.
Carlos Bondan, Jéssica Aneris Folchini, Mirela Noro, Daniel Lazzari Quadros, Karine Martini Machado, Félix Hilário Diaz González   +5 more
doaj   +1 more source

Essential Trace and Toxic Element Content in Lacaune Sheep Milk during Lactation

Foods, 2023
The aim of this study was to investigate the concentrations of essential trace and toxic elements in the milk of Lacaune sheep during lactation in intensive rearing systems.
Zvonko Antunović, Boro Mioč, Josip Novoselec, Ivan Širić, Valentino Držaić, Željka Klir Šalavardić   +5 more
doaj   +1 more source

Lysine Metabolism by the Mammary Gland of Lactating Goats at Two Stages of Lactation

Journal of Dairy Science, 2000
An arteriovenous kinetics technique was used to monitor mammary gland lysine and protein metabolism in goats (n = 4) at two stages of lactation (80 +/- 17 vs. 233 +/- 14 DIM) in response to an i.v. infusion of lysine (Lys) plus methionine (Met). At each stage of lactation [2-15N] and [1-13C; 6,6-2H2] Lys kinetics were performed on the last day of 5-d i.
S J, Mabjeesh, C E, Kyle, J C, Macrae, B J, Bequette   +3 more
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Determination of some serum macroelement minerals levels at different lactation stages of dairy cows and their correlations

Scientific African, 2020
Minerals levels in blood affects animal performance, such as reproduction, immunity, and lameness. Minerals blood levels are recorded for all world tropics to be affected by lactation yield.
I.M.T. Fadlalla, Shadia A. Omer, M. Atta
doaj   +1 more source

CERULOPLASMIN ACTIVITY AND ITS RELATION TO COPPER LEVEL IN BLOOD SERUM OF FRIESIAN DAIRY COWS. [PDF]

Assiut Veterinary Medical Journal, 2014
The relationship between ceruloplasmin, a metalloenzyme with oxidase activity, and copper was investigated in Frisian dairy cows.The oxidase activity of ceruloplasmin correlated closely with the serum copper concentrations in Frisian dairy cows ...
GHADA MOHAMED, EMAN M.A. EL-NASER, HANAN K. ELSAYED   +2 more
doaj   +1 more source

Blood Lipids of Cows at Different Stages of Lactation

Journal of Dairy Science, 1968
Abstract The levels and uptake by the mammary gland of blood lipid components, acetate, ketone bodies, and glucose during early or late lactation were compared to the values during the dry period. During the dry period, levels of plasma phospholipids, cholesterol esters, and free cholesterol dropped to 38.0, 51.7, and 63.9%, respectively, whereas ...
P N, Varman, L H, Schultz
openaire   +2 more sources