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This study was conducted to determine the role of azotobacter bacteria and nitrogen fertilizer in the growth and yield of two hybrids of chilli pepper. The experiment included two factors: the first factor was two hybrids of chilli pepper (Barbarian and Hyffa), while the second factor was the fertilizer treatments, which consisted of eight treatments: the controle treatment, spraying with distilled water (T1), inoculation with the Azotobacter biofertilizer (T2), spraying urea fertilizer at a concentration of 150 mgl-1 (T3), spray urea fertilizer at a concentration of 300 mgl-1 (T4), spray urea fertilizer at a concentration of 450 mgl-1 (T5), Azotobacter + spraying urea fertilizer at a concentration of 150 mgl-1 (T6), Azotobacter + spraying urea fertilizer at a concentration of 300 mgl-1 (T7), and Azotobacter + spraying urea fertilizer at a concentration of 450 mgl-1 (T8). The experiment carried out according to a split plot system design within a randomized complete block design(RCBD) with three replications. The first factor (hybrid) placed in the main plots and the second factor (fertilizer treatments) was placed in the sub-plots. The means compared according to the least significant difference test. (L.S.D) at a probability level of 5%. The results can summarized as follows: The interaction treatment between the fertilizer treatments and the chilli pepper hybrid (T8×Barbarian) showed significant superiority in most of the studied indicators compared to the other interaction treatments and gave the highest values in the percentage of elements in the leaves: Nitrogen (3.021%), Phosphorus (0.567%), Potassium (3.791%). It excelled in indicators of vegetative growth and chlorophyll content in leaves (362.1 mg 100 g - 1 fresh weight). It also excelled in quantitative indicators of yield represented by fruit weight (33.66 g), number of fruits (34.16 fruits Plant-1), and plant yield (1.149 kg plant-1), and it also excelled in the qualitative indicators of the fruits and their vitamin C content (121.3 mg 100 g-1 ).
Farhan et al. (Tue,) studied this question.