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1、EuropeanJournalofAgronomy11(1999)227±237www.elsevier.com/locate/ejaAdaptationandyieldingabilityofcastorplant(RicinuscommunisL.)genotypesinaMediterraneanclimateS.D.Koutroubasa,D.K.Papakostaa,*,A.DoitsinisbaLaboratoryofAgronomy(233),SchoolofAgriculture,AristotleUniversityo
2、fThessaloniki,Gr-54006Thessaloniki,GreecebNAGREF,CottonandIndustrialplantsInstitute,Sindos,57400Thessaloniki,GreeceAccepted1June1999AbstractSuccessfulcastor(RicinuscommunisL.)croppinginGreecedependsontheyieldingabilityandyieldstabilityofthecultivars(hybridsorinbreds)aswe
3、llasthereliabilityofproductionsystems.Theadaptationandyieldingabilityof19moderncastoroilgenotypeswerestudiedfor3yearsintwositesofNorthernGreece.Genotypescombininghighseedandoilyieldanddesirablemorphologicalcharacteristicsweretestedfor2or3years,whereastherestweretestedfor
4、1yearonly.Thegrowingperiodinbothlocationswaslongenoughforripeningthe®rstracemeandanumberofsecondaryracemesdependingonthegenotypes.TheplantheightwasdependentmainlyonthegenotypesbutalsowasaVectedbythesiteandtheyearoftheexperimentationandrangedfrom79to278cm.Theseedyieldvari
5、edbetween2.5and5.0Mgha−1,valuesthatareamongthehighestreportedintheliterature.Theseedyieldwashigherinthesitewhereplantsproducedandripenedmoresecondaryracemes.Theseedoilcontentwasdependentmainlyonthegenotypeandrangedfrom44.5to54.2%.Theoilyieldfollowedthechangesinseedyield.
6、Thevariationinseedyieldbetweenyearswaslowandinmostgenotypeslessthan20%.Resultsindicatethatthecastoroilcropwassatisfactorilyadaptedinthearea.©1999ElsevierScienceB.V.Allrightsreserved.Keywords:Mediterraneanclimate;Oilyield;Ricinuscommunis;Seedyield1.Introductioncountriesar
7、eBrazil,China,IndiaandthecountriesoftheformerSovietUnion.Yieldsinthesecoun-Castorplant(RicinuscommunisL.)isanoilseedtriesaregenerallylow,between400andplantwithanoilcontentbetween40and60%in900kgha−1(Bonjean,1991),mainlyasaresultcommercialvarieties(Weiss,1983).Castoroilhas
8、ofgrowingunimprovedcultivarsandextensiveuniquephysicalandchemicalpropertiesamongcultivation.thevegetati
