A metaanalysis of feeding strategies to increase the content of conjugated linoleic acid (CLA) in da

16A.Siurana,S.Calsamiglia/AnimalFeedScienceandTechnology217(2016)13–26Table1Averagesofmajorfattyacidscomposition(mean±SD,g/100goftotalfattyacids)ofsupplementspresentsinpublications(includingallmethodsofpresentation).SupplementNC18:1C18:2C18:3Rapeseed460.0±2.1020.6±2.768.9±0.90Corn623.3±5.3951.6±1.613.1±2.67Cornsilage1416.1±4.2836.7±8.688.0±4.52Fish129.8±1.881.2±0.221.3±0.87Sunflower830.3±19.3554.6±17.140.7±1.23Linseed1619.0±1.7517.7±4.2952.9±6.30Soybean1520.3±2.8152.5±2.436.8±1.69Daysinmilk(DIM)atthebeginningofexperimentswere<100DIMin32experiments(earlylactation),100–200DIMin31experiments(mid-lactation),>200DIMin7experiments(late-lactation)and2experimentsdidnotspecifyDIM.Simpleregressionwasperformedamongbreed,DIMandyearofpublication,andconcentrationofcis-9,trans-11CLAtotesttheeffectofthesevariablesonconcentrationofcis-9,trans-11CLA.Breed,DIMandyearofpublicationhadnoeffectoncis-9,trans-11CLAresults,thereforealldatawasincludedinonecategory.Totakeintoaccountdifferencesamongexperimen