Results 11 to 20 of about 2,179,464 (293)

Factors affecting lactation length and effect of current lactation length on the subsequent production and reproduction in Iranian Holsteins [PDF]

Archives Animal Breeding, 2013
Abstract. Calving records of Holstein cows from January 1983 to December 2006 comprising 1,190 herds with 385,102 calving events were used to evaluate factors affecting the length of lactation and effect of current lactation length on the next productive and reproductive performances of Iranian Holsteins.
N. G. Hossein-Zadeh
openaire   +3 more sources

Persistency of Lactation, Lactation Yield, and Lactation Length in Thari Cattle at Thari Cattle Farm, Umerkot, Sindh

Bioscientific Review
Background. The current study was carried out to determine the persistency of lactation in Thari cattle, in view of the impact of heritability and seasons. Method.
Azhar Hussain Kaleri, Hubdar Ali Kaleri, Habibullah Janyaro, Muhammad Anees Memon, Muhammad Awais Memon, Naqeeb Ur Rehman, Dure Shahwar, Mudasar Ahmed Khosa, Rameez Raja Kaleri   +8 more
doaj   +2 more sources

ENVIRONMENTAL FACTORS AFFECTING MILK YIELD AND LACTATION LENGTH IN SAHIWAL CATTLE [PDF]

Pakistan Veterinary Journal, 2004
Weekly milk yield records on 661 Sahiwal cows calving during 1990-2000 at the Livestock Experiment Station Bahadurnagar, Okara were used to study how milk yield and lactation length were affected by different environmental factors.
I.R. Bajwa, M. S. Khan, M. A. Khan1 and K. Z. Gondal2
doaj   +2 more sources

Extending lactation length: consequences for cow, calf, and farmer. [PDF]

J Anim Sci, 2022
Abstract Traditionally, a 1-yr calving interval is advised to farmers from an economical point of view, to realize a yearly peak in milk yield. A 1-yr calving interval, however, implies a yearly event of drying-off, calving and start of lactation, which are all associated with an increased risk for diseases and disorders. Deliberately
van Knegsel ATM, Burgers EEA, Ma J, Goselink RMA, Kok A.   +4 more
europepmc   +4 more sources

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   +3 more sources

LACTATION PERFORMANCE AND LACTATION CURVE TRAITS IN GRAZING KATAHDIN SHEEP [PDF]

Chilean Journal of Agricultural & Animal Sciences
The aim of this study was to assess lactation traits, lactation curve shape and curve parameters in Katahdin sheep under a grazing-based feeding system. A total of 27 second-parity Katahdin ewes were evaluated. The animals were kept on a pasture composed
María de Lourdes Alonso Herrera, Homero Salinas-González, Eric Groose, Jorge A. Maldonado Jáquez, Glafiro Torres-Hernández, Francisco Guadalupe Echavarría Chairez, Alberto Muro Reyes, Luis Humberto Díaz García   +7 more
doaj   +2 more sources

Milk production and lactation length in Ankole cattle and Ankole crossbreds in Rwanda. [PDF]

Trop Anim Health Prod, 2020
AbstractThis study assessed daily milk yield (DMY), 100-day (MY100), and 305-day (MY305) milk yield, and lactation length (LL) in purebred Ankole cattle and Ankole crossbreds, and the influence of environmental factors on these traits. Milk yield data were obtained for 865 cows and 1234 lactations and analyzed using a mixed linear model.
Manzi M, Rydhmer L, Ntawubizi M, D'Andre Hirwa C, Karege C, Strandberg E.   +5 more
europepmc   +5 more sources

Fitting lactation curves in a Colombian Holstein herd using nonlinear models [PDF]

Revista Facultad Nacional de Agronomía Medellín, 2018
Statistical characterization of dairy cows lactation curves allows prediction of total milk yield from one or a few test-day records. The objectives were the characterization of milk production in a Colombian Holstein herd under tropical dairy production
Norma Patricia Duque López, Joaquim Casellas Vidal, Jorge Humberto Quijano Bernal, Ramon Casals Costa, Francesc Xavier Martí Such   +4 more
doaj   +2 more sources

Analysis of lactation feed intakes for sows with extended lactation lengths [PDF]

Translational Animal Science, 2017
Abstract The objectives of this research were to quantify and model daily feed intakes to 28 d of lactation in modern sows. A total of 4,512 daily feed intake (DFI) records were collected for 156 Hypor sows from February 2015 to March 2016. The mean lactation length was 27.9 ± 2.0 d.
Cabezón, F. A., Schinckel, A. P., León, Y. L., Craig, B. A.   +3 more
openaire   +2 more sources

Fertility and milk production on commercial dairy farms with customized lactation lengths [PDF]

Journal of Dairy Science, 2021
Drying-off, calving, and start of lactation are critical transition events for a dairy cow. As a consequence, most animal health issues occur during these periods. By extending the voluntary waiting period for first insemination after calving, calving interval (CInt) can be extended, with possible positive effects for fertility and health.
Burgers, E.E.A., Kok, A., Goselink, R.M.A., Hogeveen, H., Kemp, B., van Knegsel, A.T.M.   +5 more
openaire   +2 more sources