تأثير تراكيز الرش بالجيتوسان و مستويات السماد المركب بطيء التحلل في بعض صفات النمو الخضري و الجذري لنوعين من الدراسينيا Dracaena Sp

Abstract EN

A study was conducted during the agricultural season 2019-2020, in a plastic house in which the temperature and humidity are controlled throughout the study period.

The experiment included three factors: the first factor is two species of Dracaena, Dracaena marginata, and Dracaena massengeana, second factor, spraying with chitosan in two concentrations (0, 500) mg.L-1 , third factor is the application of slow-release fertilizer at three levels (0, 5, 10) gm.pot-1 .

The experiment was designed by the complete randomized block design (RCBD) with split plot, where the species were placed on the main plots.

The results showed a clear response of the two types of dracaena after six months.

chitosan spraying gave a significant percentage increase in plant height, and number of leaves (63.37, 76.04) %, respectively.

Application of slow-release fertilizers gave an increase of plant height, and number of leaves (60.79, 74.41)% respectively.

Highest decorative value was recorded for interaction between the two types, D.

marginata and D.

massengeana and spraying with chitosan at a concentration of 500 mg.L-1 and the application of slow-release fertilizers 10 g.pot-1 gave value 5 for both treatments.

While treatment interaction between the type D.marginata and spray with chitosan at a concentration of 500 mg.L-1 and the application of slow-release fertilizers at a concentration of 10 g.pot-1 significant increase in the root dry weight gave a dry weight of 16.02 g.