The effect of organic nutrient spraying and biofertilizer on the nutrient content of sweet pepper (Capsicum annuum L.) leaves

The field experiment was conducted in one of the protected plastic greenhouses, using a Randomized Complete Block Design (RCBD) with two factors. The first factor was a nutrient solution at three concentrations (0, 2, and 4 g/L), and the second factor was a bio-fertilizer at three concentrations (0, 2, and 4 mL/L). The means of the treatments were compared using the Least Significant Difference (LSD) test at a significance level of 0.05.The results indicated that the treatment with organic nutrient spraying at a concentration of 4 g/L significantly outperformed others in terms of nitrogen percentage (2.643%), phosphorus percentage (0.5900%), and potassium percentage (2.0067%) in the leaves compared to the control treatment. Additionally, the bio-fertilizer spraying treatment at a concentration of 4 mL/L significantly yielded the highest values for nitrogen percentage (2.113%), phosphorus percentage (0.5133%), and potassium percentage (1.8478%) compared to the control treatment.