تأثير الباكلوبترازول و المستحضر الحيوي لبكتريا Bacillus subtilis في نمو نبات عين البزون

Abstract EN

An experiment aimed to determine the effect of paclobutrazol and the bio-formulation of Bacillus subtilis on the growth characteristics of Catharanthus roseus (L.) G.

Don.Field experiment was performed under wood canopy in Horticulture and Landscape Architecture Department, College of Agriculture, Kufa University, during 2010-2011.

A factorial experiment (two factors) according to Randomized Complete Block Design ( RCBD).Seeds were inoculated with different concentrations of bio-formulation (0, 10, 15, 20 g/ Kg seeds).

Then, after 2 months , plants were sprayed with paclobutrazol at concentrations (0, 5, 10, 15 mg / L).

Results show that paclobutrazol leads to decrease in the length of plants and leaf area but increase stem diameter and dry weights of leaves and shoot .

The bio-formulation increases all the studied growth characteristics of the plant.The interactions between both paclobutrazol and bio-formulation lead also to a significant increase in the growthcharacteristics of Catharanthus roseus.