title: Effects of the thermal environment on metabolism of deoxynivalenol and thermoregulatory response of sheep fed on corn silage grown at enriched atmospheric carbon dioxide and drought.
abstract: Future livestock production is likely to be affected by both rising ambient temperatures and indirect effects mediated by modified growth conditions of feed plants such as increased atmospheric CO2 concentrations and drought. Corn was grown at elevated CO2 concentrations of 550 ppm and drought stress using free air carbon dioxide enrichment technology. Whole plant silages were generated and fed to sheep kept at three climatic treatments. Differential blood count was performed. Plasma DON and de-epoxy-DON concentration were measured. Warmer environment increased rectal and skin temperatures and respiration rates (p < 0.001 each) but did not affect blood parameters and the almost complete metabolization of DON into de-epoxy-DON. Altered growth conditions of the corn fed did not have single effects on sheep body temperature measures and differential blood count. Though the thermoregulatory activity of sheep was influenced by the thermal environment, the investigated cultivation factors did not indicate considerable impacts on the analysed parameters.
authors.affiliation: Federal Research Institute for Animal Health, Bundesallee 50, 38116, Brunswick, Germany.
authors.forename: Malte
authors.initials: M
authors.lastname: Lohölter
authors.forename: Ulrich
authors.initials: U
authors.lastname: Meyer
authors.forename: Susanne
authors.initials: S
authors.lastname: Döll
authors.forename: Remy
authors.initials: R
authors.lastname: Manderscheid
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Weigel
authors.forename: Martin
authors.initials: M
authors.lastname: Erbs
authors.forename: Martin
authors.initials: M
authors.lastname: Höltershinken
authors.forename: Gerhard
authors.initials: G
authors.lastname: Flachowsky
authors.forename: Sven
authors.initials: S
authors.lastname: Dänicke
mesh_terms: D000818:Animals; D001711:Biotransformation; D001833:Body Temperature Regulation; D002245:Carbon Dioxide / Q000494:pharmacology*; D002369:Castration; D055864:Droughts; D005670:Fusarium / Q000187:drug effects* / Q000502:physiology; D008297:Male; D034561:Sheep, Domestic / Q000097:blood*; D012820:Silage / Q000032:analysis / Q000382:microbiology; D013312:Stress, Physiological; D013696:Temperature; D014255:Trichothecenes / Q000097:blood*; D003313:Zea mays / Q000737:chemistry / Q000187:drug effects* / Q000382:microbiology
chemical_list: D014255:Trichothecenes; D002245:Carbon Dioxide; C048238:deepoxy-deoxynivalenol; C007262:deoxynivalenol