Accumulation of nitrogen, phosphorus, potassium and sulfur in capsicum (Capsicum annuum L.) as influenced by vermicompost and NPK fertilizers

Abstract

Soil fertility is one of the most promising factors that directly impact sustainable crop production. Therefore, a pot experiment was conducted in net house on capsicum (Capsicum annuum L.) in the agricultural soil to study the effects of vermicompost (VC) and inorganic fertilizers (NPK) on growth, yield and nutrient content in capsicum plants. The growth parameters and nutritional values were observed during the experiment under eleven treatments. The treatments variables are T₁ (control, -VC & -NPK), T₂ (VC 5 ton/ha), T₃ (VC 10 ton/ha), T₄ (VC 15 ton/ha), T₅ (N₆₀P₃₅K₆₀ kg/ha), T₆ (VC 5 ton/ha +N₄₈P₂₈K₄₈ kg/ha), T₇ (VC 10 ton/ha + N₄₈P₂₈K₄₈ kg/ha), T₈ (VC 15 ton/ha + N₄₈P₂₈K₄₈ kg/ha), T₉ (VC 5 ton/ha + N₃₆P₂₁K₃₆ kg/ ha), T₁₀ (VC 10 ton/ha + N₃₆P₂₁K₃₆ kg/ha), T₁₁ (VC 15 ton/ha + N₃₆P₂₁K₃₆ kg/ha) which were arranged in a completely randomized design (CRD) with three replications. There were statistically significant differences in each treatment for growth and yield parameters. The highest plant height (45 cm), the highest number of leaves (44 no/plant), and the highest leaf area index (90 cm²) were found in the treatments T₆, T₅ and T₉ respectively. The lowest values for all of the above parameters were found in the treatment T₁ (control). Then the highest yield parameters fruit no/ plant (3), total fresh weight (39.60 g/plant), and total dry weight (2.38 g/plant) were observed under the treatment T₁₁. The results of the growth and yield parameters varied significantly (p<0.05). The concentrations of total N, P, K and S in different parts were measured and varied significantly (p<0.05) in leaf, stem, root and seeds. Analysis of post-harvest soil also revealed that every physico-chemical property and nutritional value were changed significantly due to different treatments.

Dhaka Univ. J. Biol. Sci. 32(1): 73-81, 2023 (January)