?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Feed+Supplements+for+Young+Dairy+Breed+Calves+After+Turn-Out+to+Pasture%3A+Effect+on+Weight+Gain+and+Subclinical+Coccidiosis+in+Organic+Production+Systems&rft.creator=Nielsen%2C+Ph.D.+stud.+B.K.&rft.creator=Thamsborg%2C+Professor+S.M.&rft.creator=Kristensen%2C+Dr.+T.&rft.subject=+Feeding+and+growth&rft.description=On+two+organic+farms%2C+the+effect+of+supplementation+with+either+home-grown+barley+or+organic+commercial+concentrates+primarily+based+on+local+protein+sources+and+barley%2C+on+weight+gain+and+subclinical+coccidiosis+was+investigated+in+3-5+months+old+dairy+breed+calves+in+the+period+after+turn-out+to+ryegrass%2Fclover+pastures.+The+calves+(mean+liveweight+%C3%82%C2%B1+SD%2C+124+%C3%82%C2%B1+24+kg+and+133+%C3%82%C2%B1+24+kg+on+Farm+I+and+II+respectively)+were+supplemented+daily+with+3+kg+energy+and+protein-rich+commercial+concentrates+(group+EP)%2C+3+kg+barley+(group+E)+or+%C3%82%C2%BD+kg+barley+(group+Eres)+for+8+weeks+following+turn-out+on+pasture.%0D%0A%0D%0ADaily+weight+gains+in+the+8+weeks+were+for+Farm+I%3A+1216+and+1042+g%2Fday+for+group+EP+and+E+(P+%3C+0.01)+and+for+Farm+II%3A+1071%2C+671+and+770+g%2Fday+for+group+EP%2C+E+and+Eres+respectively+(P+%3C+0.001).+However%2C+liveweights+were+similar+between+groups+at+housing%2C+although+group+EP+had+significantly+higher+liveweight+at+housing+on+Farm+I+(P+%3C+0.01).+Initial+liveweight+had+effects+on+daily+gain+in+the+grazing+season%2C+but+supplementation+with+energy+and+protein+reduced+this+effect+on+Farm+I.+No+clinical+signs+of+coccidiosis+were+observed%2C+but+markedly+higher+levels+of+oocysts+per+gram+faeces+(opg)+were+observed+on+Farm+II%2C+using+pastures+previously+grazed+by+cattle+compared+to+Farm+I.+Calves+having+a+maximum+oocyst+count+above+5+000+opg+were+subclinically+affected+by+coccidiosis%2C+as+indicated+by+low+faecal+dry+matter+and+reduction+in+daily+gain+of+222+g%2Fday+(P+%3C+0.05).+It+is+concluded+that+liveweight+can+be+increased+when+supplementing+calves+with+organic+concentrates+rich+in+energy+and+protein+in+the+period+following+turn-out+compared+to+supplementation+with+barley+alone.+However%2C+the+overall+gain+at+the+end+of+the+grazing+season+is+limited+due+to+compensatory+growth+in+the+grazing+period+following+supplementation.%0D%0A&rft.date=2003&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F1396%2F1%2FArticle.pdf&rft.identifier=Nielsen%2C+Ph.D.+stud.+B.K.%3B+Thamsborg%2C+Professor+S.M.+and+Kristensen%2C+Dr.+T.+(2003)+Feed+Supplements+for+Young+Dairy+Breed+Calves+After+Turn-Out+to+Pasture%3A+Effect+on+Weight+Gain+and+Subclinical+Coccidiosis+in+Organic+Production+Systems.+Acta+Agric.+Scand.+Animal+Science%2C+53%2C+pp.+1-10.&rft.relation=http%3A%2F%2Forgprints.org%2F1396%2F