Mageda Alrwily(1)*, Areej Alkheder(2), Sameer AlAhmed(1), Muhammad Manhal Alzoebi(2), Thamer Hnish(1), Samar Alali(1), Fadi Aji(1), Wael Mali(1)
(1). General Commission For Scientific Agricultural Research-Crop Administration-Damascus-Syria
(2). General Commission For Scientific Agricultural Research-Resources Administration-Damascus-Syria
(*Corresponding author: Dr. Mageda Alrwily, Email: dr.mageda@gmail.com,)
Received:1/03/ 2023 Accepted:5/01/ 2023
Abstract:
A field trial was conducted to investigate the effect of varieties, nitrogen fertilizers levels and their application dates on some morphophisiological and Quantitative Traits of corn (Zea mays L.) at Karahta Research Station, General Commission for scientific Agricultural Research, Damascus, Syria, During two consecutive growing seasons (2018,2019). The split- split plot arrangement in RCBD with three replications was used. The experiment included tow corn varieties (Gota82 and salmia-1) and four nitrogen fertilizer level ( 7, 13, 19, 25 kg N.ha-1) and four application dates of fertilizer (half of recommended level was added at sowing and the other half after 30 days from sowing; half of recommended level was added at sowing and half after 50 days from sowing: half of recommended level was added after30 days from sowing and half after 50 days from sowing: a first third of recommended level was added at sowing , second third after 30 days from sowing and the last third of recommended level was added after 50 days from sowing. And treatments (without fertilization). The nitrogen fertilizer levels and application dates and varieties were represented as main plot, sub plot and sub- sub plot respectively. The results indicated significantly superior treatment (13kg N. ha-1) were the varieties gave the best number of leaves by 12 leave and thus increase the effective leaf area which reflected positively on the grain yield by rate 19% , The characteristic of plant still green at harvest by rate 63% .
Key words: Maize, The nitrogen fertilizer levels, application dates nitrogen fertilizer, Grain yield.
Full paper in Arabic: pdf