Manar Zier ⁽¹⁾ , Aziz Assaad ⁽²⁾  and  Mazen Ashram ⁽¹⁾

(1). Research Center of latakia, General commission for Scientific Agricultural research, Latakia, Syria.

(2). Department of Water and Soil Science,  Faculty of Agricultural Engineering,  Tishreen University, Lattakia, Syria.  

(*Corresponding author: Manar zier, Email: manarzier@gmail.com)

Received: 23/06/ 2023             Accepted: 31 /08 / 2023

Abstract: 

The research was conducted at the Al-Snobar Research Station, in Latakia Agricultural Scientific Research Center. The study aimed to investigate the effect of different levels of N (Nitrogen), P (Phosphorus), and K (Potassium) fertilizers on the content of the main nutrients on the roots, total green mass, and fruits of the pepper plant, Robber variety. The experiment included six treatments, with three replications for each treatment. T0 (3 Kg N- 0 Kg P₂O₅– 0.8 Kg k₂o), T1 (6.2 Kg N- 0 Kg P₂O₅– 0 Kg K₂O), T2(13.9 Kg N- 1.9 Kg p₂o₅– 3.7 Kg k₂o), T3 (21.5 Kg N- 4.7 Kg P₂O₅– 14.8 Kg K₂O), T4 (29 Kg N- 7.6 Kg P₂O₅– 26 Kg K₂O), T5 (36.9 Kg N- 10.4 Kg P₂O₅– 37 Kg K₂O) for greenhouse has an area 400 m2. The experimental design was based on Complete Randomized Blocks (CRB), and the statistical analysis was performed using the “Costat” program. The results showed that fertilization significantly influenced the studied traits. The results showed a significant increase in plant height in treatments T5 (36.9 Kg N- 10.4 Kg P2O5- 37 Kg K2O) and T4 (29 Kg N- 7.6 Kg P2O5- 26 Kg K2O) compared of the rest of the treatments, the highest plant height was recorded during the flowering stage in treatment T5 (20.76 cm). the dry matter increased in both the plant and fruits in treatments T4 and T5, the highest of dry matter in the plant (23.93%) and the fruit (5.76%) was obtained in treatment T4. as well as the concentration of NPK elements in the roots, total green mass, and fruits increased significantly in treatments T4 and T5 compared to the control.

Keyword: fertilization, sweet pepper, protected cultivation, dry matter, morphological traits.

Full paper in Arabic: pdf