Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : EFFECT OF SOME IRRIGATION AND CHEMICAL FERTILIZATION TREATMENTS ON VEGETATIVE GROWTH AND CHEMICAL COMPOSITION OF SOME WOODY TREES SPECIES

Auteur : AHMED, MONA SALAH MAHMOUD.

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Agricultural Sciences (Protected Cultivation Technology in Arid Land) 2022

Résumé
This study was carried out at the Gamasa forestry, EL-Dakahlia Governorate, during the period from March 2018 to September 2021 for studying the effect of irrigation intervals and sulphur fertilization rates on vegetative growth and chemical composition of Khaya senegalensis, Swietenia macrophylla and S. mahagoni seedlings. Four irrigation intervals were used i.e., every day, two, three and four days, intervals. In addition, four sulphur fertilization rates were used as follow : without fertilizer (control), 15, 30 and 45 g/plant. The following data were recorded, stem length, stem diameter, total fresh and dry biomass, chlorophyll a & b and carotene leaves contents in addition to Cr, Mn, Zn, Ni, Fe, Cu and S content for roots, branches and leaves. Results indicated that, application of sulphur fertilization at the rate of 45g/plant produced the tallest, thickest, higher values of total aboveground bio and dry mass for khaya plants. In addition that, there were non-significant differences between irrigation every one or two days in all vegetative growth characters and absorption of heavy metals. On other hand, application of sulfur fertilizer at the rate of (45 g/plant) and irrigation every one or two days was the superior treatment, as it produced the best vegetative characters tested, in addition, multiple absorption of heavy metals, Cr, Mn, Zn, Ni, Fe, Cu and S by Khaya senegalensis, Swietenia macrophylla and S. mahagoni seedlings plants in comparison with the other treatments.

Présentation étendue (EULC)