Length of lags in responses of milk yield and somatic cell score on test day to heat stress in Holsteins.
Holstein
heat stress
temperature-humidity index
test day
Journal
Animal science journal = Nihon chikusan Gakkaiho
ISSN: 1740-0929
Titre abrégé: Anim Sci J
Pays: Australia
ID NLM: 100956805
Informations de publication
Date de publication:
May 2019
May 2019
Historique:
received:
11
09
2018
revised:
07
01
2019
accepted:
18
01
2019
pubmed:
1
3
2019
medline:
29
5
2019
entrez:
1
3
2019
Statut:
ppublish
Résumé
We used daily records from provincial Japanese weather stations and monthly test-day records of milk production to investigate the length of the lags in the responses of cows' milk yield and somatic cell score (SCS) to heat stress (HS). We also investigated the HS thresholds in milk yield and SCS. Data were a total of 17,245,709 test-day records for milk and SCS in Holstein cows that had calved for the first time between 2000 and 2015, along with weather records from 60 weather stations. Temperature-humidity index (THI) values were estimated by using average daily temperature and average daily relative humidity. Adjusted THI values were calculated by using temperature, relative humidity, wind speed, and solar radiation. The model contained herd, calving year, month of test day, age group, days in milk, and THI as a fixed effect. THIs for each day from 14 days before the test day until the test day were used to represent the HS effects. The HS occurring 3 days, and between 8 and 10 days, before the test day had the greatest effect on the milk yield and SCS, respectively. The threshold THI values for the HS effect were about 60-65 for both traits.
Identifiants
pubmed: 30815937
doi: 10.1111/asj.13186
pmc: PMC6593864
doi:
Substances chimiques
Milk Proteins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
613-618Subventions
Organisme : Development of Breeding Technology for Animal Life Production
Informations de copyright
© 2019 The Authors. Animal Science Journal published by John Wiley & Sons Australia, Ltd on behalf of Japanese Society of Animal Science.
Références
J Dairy Sci. 2008 Feb;91(2):840-6
pubmed: 18218772
J Dairy Sci. 2013 May;96(5):3028-33
pubmed: 23498016
J Dairy Sci. 2017 Sep;100(9):7362-7367
pubmed: 28711268
Animal. 2014 Apr;8(4):667-74
pubmed: 24513161
J Dairy Sci. 2013 Mar;96(3):1844-55
pubmed: 23313002
Animal. 2016 Aug;10(8):1263-70
pubmed: 26906742
J Anim Sci. 2017 May;95(5):1900-1912
pubmed: 28727006
Anim Sci J. 2017 Jan;88(1):3-10
pubmed: 27113198
J Dairy Sci. 2003 Jan;86(1):232-42
pubmed: 12613867
J Dairy Sci. 2014;97(1):319-29
pubmed: 24239072
Animal. 2017 Jan;11(1):4-14
pubmed: 27532229
J Dairy Sci. 2017 Nov;100(11):8645-8657
pubmed: 28918147
J Dairy Sci. 2003 Nov;86(11):3736-44
pubmed: 14672205
J Dairy Sci. 2000 Sep;83(9):2126-30
pubmed: 11003247
Anim Sci J. 2019 May;90(5):613-618
pubmed: 30815937
J Dairy Sci. 2016 Apr;99(4):2849-2862
pubmed: 27037467
J Dairy Sci. 2015 Jul;98(7):4956-68
pubmed: 25958288
J Dairy Sci. 2016 Dec;99(12):10067-10076
pubmed: 27665136
J Dairy Sci. 2000 Sep;83(9):2120-5
pubmed: 11003246
J Dairy Sci. 2014;97(1):471-86
pubmed: 24210494
Stat Med. 2003 Oct 15;22(19):3055-71
pubmed: 12973787
J Dairy Sci. 2016 May;99(5):3798-3814
pubmed: 26923054
J Anim Sci. 2006 Mar;84(3):712-9
pubmed: 16478964
Genet Sel Evol. 2009 Nov 24;41:51
pubmed: 19930712
J Anim Sci. 2017 Apr;95(4):1813-1826
pubmed: 28464073