Initial fertilizer recommendation for pepper plant (Capsicum anuumm) in green house

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 some morphological and productive characteristics 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) for greenhouse has an area 400 m2. T1 (6.2 Kg N- 0 Kg P2O5- 0 Kg K2O) for greenhouse has an area 400 m2. T2(13.9 Kg N- 1.9 Kg p2o5- 3.7 Kg k2o) for greenhouse has an area 400 m2. T3 (21.5 Kg N- 4.7 Kg P2O5- 14.8 Kg K2O) for greenhouse has an area 400 m2. T4 (29 Kg N- 7.6 Kg P2O5- 26 Kg K2O) for greenhouse has an area 400 m2. , 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, the dry matter in both the plant and fruits, and some morphology characteristics of the fruits such as, fruit diameter, fruit wall thickness, and fruit weight 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 results also showed that the highest yield of fruits and the highest yield content of vitamin C was in the T5 treatment. And the productivity reached 4.17 tons/ green house. The results also showed that the highest yield of fruits and the highest yield content of vitamin C was in the T5 treatment. And the productivity reached 4.17 tons/ green house. Increasing the rate of fertilization led to an increase in the concentration of nitrogen, and potassium in the plant parts (roots- total green mass - fruits), while the fruits content of calcium and magnesium was not affected. Fertilization also had a significant effect on some soil properties, the percentage of organic matter decreased with the increase in the rate of fertilization, while the electrical conductivity of the soil increased. As well as the effect of fertilization significantly on the soil content of major and minor nutrients.