Effect of Some of Organic and Bio and/or Mineral Fertilization on Vegetative Growth and Chemical Composition of Delonix Regia

Abstract

This work was executed during two successive seasons of 2018 and 2019 in the nursery and laboratory of Fac. Agric., Minia Univ., Egypt to investigate the response of vegetative and root growth and some chemical composition of Delonix regia seedlings to four percentages of humic acid (0, 1, 2 and 4%) and four bio-and/or mineral NPK fertilization treatments (control, 100% NPK, Minia Azotein and 75% NPK plus Minia Azotein), as well as, the interaction between them. All used three percentages of humic acid significantly increased vegetative growth (plant height, stem diameter, the aerial part dry weight), root growth (root number and roots dry weight) and chemical composition (photosynthetic pigments, NPK%, total phenolic and total flavonoids contents) over control. Humic acid at 4% more was effective treatment. All used bio-and/or mineral NPK fertilization treatments significantly increased all studied characters over control. The best treatments were 100% NPK or 75% NPK plus Minia Azotein. It could be recommended to add humic acid at 4% in combination with 100% NPK or 75% NPK plus Minia Azotein to improve growth of Delonix regia.

In-vitro and in-vivo studies on the cell sap extract of some plant waste and using a natural biocidal to control the red mites Tetranychus urticae

“…Leave of moringa, olive and pomegranate were manually separated, cleaned from dust followed by seed removal then mechanically pressed by a Carver hydraulic laboratory press according to (Radwan and Sekina, 2016;Abdou et al, 2020;Hassan, H.M. et al, 2021).…”

Growth Quality and Bioactive Compounds of Poplar Seedlings as Affected by Different Fertilization Treatments

“…The increase in root growth features may be because of compost improving the physicochemical properties of the investigated sandy soil (Abo El-Fadle et al, 1968). Similar outcomes were obtained by Abdel-Mola (2014), Abo El-Wafa (2014) and Abdou and Ibrahim (2015) on Populus spp., Soliman (2019) on Moringa peregrina and Abdou et al (2020) on Delonix regia.…”

Comparison of Three Different Extraction Methods for the Determination of the Quality of the Leaf Volatile Oils of Delonix regia (Bojer ex Hook.Raf)

“…2 It has been used in the folk medicine for the treatment of constipation, inflammation, arthritis, hemiplagia, leucorrhoea and rheumatism. 3,4 The bark and flowers of D. regia have been reported to have broad spectrum antimicrobial activity and antiinflammatory properties. 5,6 The leaves and flowers of D. regia showed strong phytotoxicity against Mikania micrantha.…”