Possibility of double croppingof early ripeing Sunflower cultivars in the Barly feilds of Miyaneh region

This  study  was conducted   for investigation   of the effect of three between  plant   20, 25 and 30  cm on
60  cm  fixed   rows  and  early  ripeing    three  cultivars  Zaria,Azargol    and  Chemianca     on  different  triat including yield  and yield   components in Sunflower  after Barty  harvasting    in Miyaneh   region   during 2003. A fectorial   experiment    with randomized    complet   block design   and  3  replication     was  used.  In  this study some  of  vegitative    and   reproductive     stages,  morphologyeal     charactristics,     dry  wieght  various   organs, yield    and  yield   components    and  harvest   index  was  evaluated.    On  the  obtained    results,    there  was  no significant    difTerencc    between    plant  densities      in   phenologycal     stages,yicld     components      and   must   of evaluated   traits  except  I 00 grain weight   and grain  yield.   Also   there was no  significant    difference  between planted cultivars the must  evaluated   triats  except shrub length  and husk  to seed portion.ln    this  experiment diffrcnce   of interaction    of density    and cultivars   with   studied   trait  wasn't   significant    except   dry wight to second  sampling.The    must  dry wieght   was obtained  in the 83000   plant/ha    tretment  with Zaria and the
55000 plant/ha tretrnent   whit  Chemianca    was the least  dry wieght.   Finaly, considering    with experimented conditions   in this study the density   of 63000 plant/ha with Azargol   for double   cropping of sunflower    is suitable for Miyaneh region.