Ammar Ammar1*, Mohammed Kheir Al–Othman1 and Saleh Al-Moustafa2
1 Department of Agronomy, Faculty of Agriculture, Alfurat University. Dier-Ezzor, Syria
2 General Commission for Scientific Agricultural Research, Dier-Ezzor Research Center, Syria.
(*Corresponding author: Ammar Abbas, Email: ammarabbas1984@hotmail.com , Tel: 0991978115).
Received: 31/ 8/ 2025 Accepted: 4/ 1/ 2026
Abstract
The field experiment was conducted at the Research Stations of Salo in Dier-Ezzor Agricultural Research Center, during the season of 2023 to study the effect different of plant densities and mineral, biological fertilizer on some morphological and productivity traits for cotton (Dier Ezzor 22). The design of the experiments was Randomized Completely Block Design with the arrangement of split plot design with three replications. Plant densities occupied main plots (included 20, 30 and 40 cm between plants in the same row) with a fixed space 70 cm between rows, while the mineral, biological fertilizer (0% control, 100% mineral (NP) fertilizer, 75% mineral (NP) + bio-fertilizers, 50% mineral (NP) + bio-fertilizers, 25% mineral (NP) + bio-fertilizers and 100% bio-fertilizer) occupied sub plots. Plant densities had significant effect on all traits, increasing plant densities by changing in distance within the plants from 40 to 20 cm, increasing the values of plant height (92.47 cm) and seed cotton yield (4852.3 kg/ha) while decreasing in number of fruiting branches/plant (10.83) and number of open bolls/plant (15.77(. The results showed that there were no significant differences between the 100 % mineral fertilizer (NP) and 75% mineral (NP) + bio-fertilizer treatments in plant height (93.44 and 92.29 cm), number of fruiting branches per plant (13.56 and 13.18), number of open bolls per plant (20.93 and 19.89) and seed cotton yield (4860.2 and 4736.1 kg/ha, Respectively). It can be concluded the spraying cotton of EM1 with mineral fertilizer (NP) had a positive impact on studied traits.
Keywords: cotton, Gossypium hirsutum, mineral and bio-fertilizers, plant densities.
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