Safflower (Carthamus tinctorius L.) root response to seaweed extract concentrations, time and method of application

In order to evaluate the response root of safflower to concentration, time and method of use of seaweed extract, a factorial experiment in a completely randomized design with three replications a greenhouse at the Agricultural Faculty of Ferdowsi University of Mashhad in 2014 was carried. Factors included concentration of seaweed extract on four levels , Stages of use seaweed extract in two levels and the use method of seaweed extract on two levels were. The results showed that the concentration of seaweed extract on the characteristics root volume, root surface, shoot to root ratio, plant height, stem diameter, number of bolls per plant and biological yield of un-direct boll very significant side effect found (p