The effect of 2-day heat stress on the lipid composition of bovine milk and serum

Autor: Cheng Li, Zhiqian Liu, Carolyn Bath, Leah C. Marett, Jennie Pryce, Simone Rochfort

Publikováno v: Frontiers in Animal Science, Vol 4 (2023)

Milk and serum were collected from dairy cows before and during a 2-day heat challenge. The concentrations of free short-chain fatty acids (SCFAs), the fatty acid (FA) profile, and the abundance of the major species of phosphatidylcholine (PC), phosp

Externí odkaz: https://doaj.org/article/f778faa5a8894a84b5359baf655798cb

Dairy Cows Offered Fresh Chicory Instead of Ensiled Pasture during an Acute Heat Challenge Produced More Milk and Had Lower Body Temperatures

Autor: S. Richard O. Williams, Peter J. Moate, Josie B. Garner, Murray C. Hannah, Khageswor Giri, William J. Wales, Leah C. Marett

Publikováno v: Animals, Vol 13, Iss 5, p 867 (2023)

The frequency, duration, and intensity of heat waves in Australia are increasing. To reduce the impact of heat waves on milk production, novel management strategies are required. Altering the forage type and amount offered affect the heat load on dai

Externí odkaz: https://doaj.org/article/c41516d77243491a97a1e975d0c70c2f

Effects of Heat Stress in Dairy Cows Offered Diets Containing Either Wheat or Corn Grain during Late Lactation

Autor: Josie B. Garner, S. Richard O. Williams, Peter J. Moate, Joe L. Jacobs, Murray C. Hannah, Greg L. Morris, William J. Wales, Leah C. Marett

Publikováno v: Animals, Vol 12, Iss 16, p 2031 (2022)

Cereal grains that differ in the rate and extent of ruminal fermentation differ in heat increment and may be used to improve thermoregulation during heat stress. This experiment investigated the responses of dairy cows in late lactation to a heat cha

Externí odkaz: https://doaj.org/article/510f78566f7e455fbd923e450f3f0994

Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge

Autor: S. Richard O. Williams, Tori C. Milner, Josie B. Garner, Peter J. Moate, Joe L. Jacobs, Murray C. Hannah, William J. Wales, Leah C. Marett

Publikováno v: Animals, Vol 11, Iss 11, p 3110 (2021)

Supplementing the diet of lactating cows with ingredients that increase energy density, or reduce internal heat production, may reduce some of the negative impacts of hot weather on milk yield. Thirty-two dairy cows were assigned either: (1) basal di

Externí odkaz: https://doaj.org/article/280f201f0f2e408f83096ec1d5b8fda7

Use of dry-matter intake recorded at multiple time periods during lactation increases the accuracy of genomic prediction for dry-matter intake and residual feed intake in dairy cattle

Autor: Sunduimijid Bolormaa, Mekonnen Haile-Mariam, Leah C. Marett, Filippo Miglior, Christine F. Baes, Flavio S. Schenkel, Erin E. Connor, Coralia I. V. Manzanilla-Pech, Eileen Wall, Mike P. Coffey, Michael E. Goddard, Iona M. MacLeod, Jennie E. Pryce

Publikováno v: Bolormaa, S, Haile-Mariam, M, Marett, L, Miglior, F, Baes, C F, Schenkel, F S, Connor, E E, Manzanilla Pech, C I V, Wall, E, Coffey, M, Goddard, M, MacLeod, I & Pryce, J E 2023, ' Use of dry-matter intake recorded at multiple time periods during lactation increases the accuracy of genomic prediction for dry-matter intake and residual feed intake in dairy cattle ', Animal Production Science . https://doi.org/10.1071/AN23022

Context: Feed is the largest expense on a dairy farm, therefore improving feed efficiency is important. Recording dry-matter intake (DMI) is a prerequisite for calculating feed efficiency. Genetic variation of feed intake and feed efficiency varies a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32d86bf0d8a1c08720c2820c91135d18
https://pure.au.dk/portal/da/publications/use-of-drymatter-intake-recorded-at-multiple-time-periods-during-lactation-increases-the-accuracy-of-genomic-prediction-for-drymatter-intake-and-residual-feed-intake-in-dairy-cattle(92e8f81e-b984-42ce-8efe-0dec91eeccb6).html