Effect of gibberellin and NPK fertilizer on some phenotypic traits and yield components of star anise plant (Pimpinella anisum L.).

Abstract

          This study was conducted in the  vegetal  garden belonging to Science Department / College Of Basic Education / University  of  Al-Mustansiriyah  for  the winter  growth  season  2015-2016 to see the effect of Increasing concentrations and levels for the growth regulator Gibberllin (GA3) and compound fertilizer NPK and the overlap between on some growth characters, yield and active component of volatile oil in anise (Pimpinella anisum L.) .

         The anise seeds planted in 1/11/2015 using compound fertilizer NPK levels  0 , 200 and 400 Kgm.h^-1 added to the soil in addition to concentration of Gebberellic acid 50 and 100 mg.ltr ^-1 sprayed on the plants in the experiment The experiment designed as Randomized Complete Block Design with three replicates so this study included  factorial experiment 3×3×3 each experiment included 27 experimental units each area size was 1×1 m²  there were a daily follow-up for the experiments of the study to hold soil and yield  services of irrigation , remove the bushes and fertilizing.

        The results for the experiment showed that adding level 400 Kgm.h^-1 of compound fertilizer NPK increase the following characters plant height 13.24%  , weight of 1000 grain 20.21%,.

       Also spraying anise plants  with the concentration 100 mg.ltr ^-1 worked on increasing some of the the studied characters such as at plant height 14.88% ,  weight of 1000 grain 7.77%.

         The overlap between level 400 Kgm.h^-1of  compound fertilizer NPK and Gebberellic concentration 100  mg.ltr ^-1 Gebberellic acid led to increase plant height