Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/18924
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cowley, Fran | en |
dc.contributor.author | Barber, D G | en |
dc.contributor.author | Houlihan, AV | en |
dc.contributor.author | Poppi, D P | en |
dc.date.accessioned | 2016-04-22T16:58:00Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Journal of Dairy Science, 98(4), p. 2356-2368 | en |
dc.identifier.issn | 1525-3198 | en |
dc.identifier.issn | 0022-0302 | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/18924 | - |
dc.description.abstract | The effects of heat stress on dairy production can be separated into 2 distinct causes: those effects that are mediated by the reduced voluntary feed intake associated with heat stress, and the direct physiological and metabolic effects of heat stress. To distinguish between these, and identify their effect on milk protein and casein concentration, mid-lactation Holstein-Friesian cows (n = 24) were housed in temperature-controlled chambers and either subjected to heat stress [HS; temperature- humidity index (THI) ~78] or kept in a THI < 70 environment and pair-fed with heat-stressed cows (TN-R) for 7 d. A control group of cows was kept in a THI < 70 environment with ad libitum feeding (TNAL). A subsequent recovery period (7 d), with THI < 70 and ad libitum feeding followed. Intake accounted for only part of the effects of heat stress. Heat stress reduced the milk protein concentration, casein number, and casein concentration and increased the urea concentration in milk beyond the effects of restriction of intake. Under HS, the proportion in total casein of αS1-casein increased and the proportion of αS2-casein decreased. Because no effect of HS on milk fat or lactose concentration was found, these effects appeared to be the result of specific downregulation of mammary protein synthesis, and not a general reduction in mammary activity. No residual effects were found of HS or TN-R on milk production or composition after THI < 70 and ad libitum intake were restored. Heat-stressed cows had elevated blood concentrations of urea and Ca, compared with TN-R and TN-AL. Cows in TN-R had higher serum nonesterified fatty acid concentrations than cows in HS. It was proposed that HS and TN-R cows may mobilize different tissues as endogenous sources of energy. | en |
dc.language | en | en |
dc.publisher | Elsevier Inc | en |
dc.relation.ispartof | Journal of Dairy Science | en |
dc.title | Immediate and residual effects of heat stress and restricted intake on milk protein and casein composition and energy metabolism | en |
dc.type | Journal Article | en |
dc.identifier.doi | 10.3168/jds.2014-8442 | en |
dc.subject.keywords | Animal Management | en |
dc.subject.keywords | Animal Nutrition | en |
local.contributor.firstname | Fran | en |
local.contributor.firstname | D G | en |
local.contributor.firstname | AV | en |
local.contributor.firstname | D P | en |
local.subject.for2008 | 070204 Animal Nutrition | en |
local.subject.for2008 | 070203 Animal Management | en |
local.subject.seo2008 | 830302 Dairy Cattle | en |
local.subject.seo2008 | 830507 Unprocessed or Minimally Processed Milk | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.email | fcowley@une.edu.au | en |
local.output.category | C1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.identifier.epublicationsrecord | une-20160421-123946 | en |
local.publisher.place | United States of America | en |
local.format.startpage | 2356 | en |
local.format.endpage | 2368 | en |
local.identifier.scopusid | 84925328873 | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 98 | en |
local.identifier.issue | 4 | en |
local.contributor.lastname | Cowley | en |
local.contributor.lastname | Barber | en |
local.contributor.lastname | Houlihan | en |
local.contributor.lastname | Poppi | en |
dc.identifier.staff | une-id:fcowley | en |
local.profile.orcid | 0000-0002-6475-1503 | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:19125 | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Immediate and residual effects of heat stress and restricted intake on milk protein and casein composition and energy metabolism | en |
local.output.categorydescription | C1 Refereed Article in a Scholarly Journal | en |
local.search.author | Cowley, Fran | en |
local.search.author | Barber, D G | en |
local.search.author | Houlihan, AV | en |
local.search.author | Poppi, D P | en |
local.uneassociation | Unknown | en |
local.year.published | 2015 | en |
local.subject.for2020 | 300303 Animal nutrition | en |
local.subject.for2020 | 300302 Animal management | en |
local.subject.seo2020 | 100402 Dairy cattle | en |
local.subject.seo2020 | 100606 Unprocessed or minimally processed milk | en |
Appears in Collections: | Journal Article |
Files in This Item:
File | Description | Size | Format |
---|
SCOPUSTM
Citations
145
checked on Jan 6, 2024
Page view(s)
1,490
checked on Jan 21, 2024
Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.