Abstract
The experiment was conducted in Al-Hussainiya palm plant / Holy Karbala governorate affiliated to the Ministry of Agriculture /Hor-ticulture Department during the growing season of 2021 AD, with the aim of knowing the effect of nano-fertilizers and marine extracts on some vegetative growth characteristics of the date palm variety Al-Khastawi .A two-factor experiment was carried out according to a randomized complete block design (RCBD) with three replica-tions, first factor was the addition of nano-fertilizer to the soil at four concentrations (0, 0.5,1 ,1.5 ml . liter-1. palm-1) while the sec-ond factor included spraying with algal extracts fertilizer at four concentrations (0, 1.5, 2.0 ,2.5 ml. liter-1. palm-1) where the nano-fertilizer was added to the soil by three additions and at the rate of one addition per month, while the spray treatment with algae ferti-lizer was six sprays between each spray and two weeks, and it was the first addition of nano-fertilizer to trees. The date palm was dated 1/3/2021, while the first application of algal fertilizer was on 3/3/2021. The results showed that the treatment with nano-fertilizer at a concentration of 1.5 ml. liter-1. palm-1 was significantly supe-rior in most of the studied traits (leaf length 3.38 cm, wet weight 41.19 gm). Furthermore, the treatment of spraying with algal ma-nure extract at a concentration of 2.5 ml. liter-1. palm-1 was signif-icantly superior in most of the studied traits (leaf length 51.83 cm, dry weight 56.96%, chlorophyll 12.56 mg g-1). Additionally, the interaction between the two fertilizers, nano-fertilizer and marine algae extracts, showed significant superiority in all studied traits.