Influence of foliar application of Magnesium and Phosporus on growth and flowering of Zinnia elegans

	Influence of foliar application of Magnesium and Phosporus on growth and flowering of Zinnia elegans
Euphrates Journal of Agriculture Science
Article 1, Volume 5, Issue 4, 2013, Pages 280-290
Abstract
Abstract : A study on the effect of Mg and P sprays on growth and flowering of Zinnia elegans plants was carried out . Four concentrations of Mg EDTA (0 , 1 , 2 , 4) g/l and four levels of P2O5 (0 , 1.5 , 2.5 , 5.0) g/l were sprayed on plants . Spraeying plants was applied two times . The first one was done a month after plannting , the second one was after 21 days from the first spray . All Mg treatments were significantly increased most of vegetative parameters studied . The concentration 1.0 g/l was superior on increasing plant height (86.14 cm) ; no.of leaves/plant (59.92) and leaves chlorophyll content (38.76 SPAD) . While 4.0 g/l was more effective on no.of branches / plant (9.58) ; leaf area (38.83 cm2) . However , 2g/l level was the best on increasing fresh and dry weight of vegetative growth (129.74 and 79.23 g) respectively . The concentration 4g/l of Mg enhanced most of the flowering parameters , no.of flower / plant recorded (26.2) ; flower diameter 4.46 cm.; flowering stem leragth 49.25 cm.; flowering stem diameter 5.0 mm.; flower fresh weight was 7.71 g. and flower dry weight 0.30 g. Moreover , treated plants were bloomed earlier , after 194 days from planting . Phosphorus was more effective on the higher conceantration treatment . The 5.0 g. increased plant height (0.13 cm) ; no.of branches / plant (16.11) ; no.of leaves/ plant (8.30) ; leave area (38.45 cm2) ; vaselife (7.85 days) ; no.of flowering / plant (19.68) ; flowering diameter (11.0 cm) ; flowering stem length (55.62 cm.) and flower stem thickness (4.75 mm.) In addition , treated plants were bloomed earlier ; they took 166 days only from planting date . The interaction between the dactors were significanted for most veqetative and flowering characters tiested .

Statistics Article View: 205 PDF Download: 125