Effect of sequestrene and mangnsium sulphate fertilizers on growth parameters on off –set of Buttom mangrove plants Concarpus lancifolius Engl.

Abstract

The experiment was conducted in a private nursery in Al-Najaf province during the growing season of 2007-2008, to study the effect of sequestrene (6% EDDHA-NaFe) fertilizer at dosage of (0, 1 and 2 g.pot-1) and spraying with magnesium sulphate at three concentration levels (0, 15 and 30 g.L-1) and their interaction on growth parameters and leaves content of total chlorophyll, iron and magnesium elements.The experimental design used in this experiment was Randomized Complete Block Design (R.C.B.D.) with three replicates, means of treatments were compared using L.S.D. at probability level of 0.05.Results revealed that fertilization with sequestrene or magnesium sulphate had a significant effect on improving trends of vegetative growth such as plant height (cm), number of leaves and branches per plant, dry weight of leaves, stem and number of main root per plant. Moreover significant increases were recorded in leaf content of total chlorophyll, iron and magnesium (22.87 mg.100 gm-1 fresh weight, 6.70 ppm and 1.24 g.kg-1 dry weight respectively ) of plants treated with 3 gm.pot-1 seuestrene, and to (21.10 mg.100 gm-1 fresh weight, 6.65 ppm and 1.28 mg.kg-1 dry weight respectively) of plants sprayed with 30 mg.L-1 magnesium sulphate fertilizer compared to plant of control treatment (without fertilizers) which produced the lowest values (17.91 mg.100 gm-1 fresh weight, 5.95 ppm and 0.93 gm.kg-1 dry weight) and (19.88 mg.100 gm-1 fresh weight, 5.95 ppm and 0.93 g.kg-1 dry weight) respectively. The results of the interaction showed that, the most effective treatment was fertilization with sequestrene (3 g/pot) and spraying with magnesium sulphate (30 g.L-1) which improved plant growth and chemical composition in comparison with the control non-fertilized plant.