EFFECT OF SOME MICROELEMENTS AND BIOSTIMULATORS ON GROWTH AND CHEMICAL COMPOSITION OF Dracaena surculosa Lindley AND Zamioculas zamiifolia Engl. PLANTS

Abstract

his study was carried out during , 2014/2015 and 2015/2016 at Ornamental Horticulture Depart., Fac. of Agric., Cairo Univ., to study the effect some micro-elements and bio stimulators on growth and chemical. composition of Dracaena surculosa Lindley. and Zamioculcas zamiifolia, Engl. The results of the three experiments can be summarized as follow: 1-First Experiment: Effect of effect some microelement treatments on Dracaena surculosa Lind. It was found treating plants with Zn, Mn and B increased significantly the length of plants and Mn at200 ppm.was the most effective. The low level of both Zn and Mn produced the thickest stems. All treatments increased the No. of shoots especially boron at 25 ppm. All treatments increased the shoot length .Spraying plants with Zn at 100 ppm ,Mn at 100 ppm and B at 25 ppm significantly increased the formation of leaves. Zn or Mn resulted the largest leaves. Mn and B produced the heaviest fresh leaves .Boron at 50 ppm and Mn at 100 ppm gave the longest roots. While, Zn at 100 ppm gave the highest No. of roots the plants treated with Mn (200 ppm) and Zn (100 ppm) contained the highest values of Chl-a and Chl-b., respectively. All treatments increased content of carbohydrates especially Zn and Mn at (200 ppm).The treatments of B at 50 ppm and Zn at100 ppm increased N- content in leaves. zinc at 200 ppm increased K and Zn-content in leaves. 2-Second Experiment: Effect of bio- stimulants on growth and chemical composition of Dra