Effect of integrated nutrient management (INM) on growth, yield, nutrient uptake and soil fertility in okra (Abelmoschus esculentus (L.) Moench) cv. Pusa A-4

Abstract

A field experiment was conducted at the instructional farm of Krishi Vigyan Kendra Jajpur, Odisha during 2015 to study the “effect of integrated nutrient management on growth, yield, nutrient uptake and soil fertility in okra” variety-Pusa A-4. It was observed that application of RDF (75%) + (25%) N through neem oil cake (T7) produced maximum plant height (131.40 cm), number of leaves/plant (19.68), leaf area (324.68cm2), minimum days to first flowering (32.1), minimum days to 50% flowering (41.8), minimum days to first harvest (37.6), maximum number of fruits/ plant (14.42) and maximum yield (9.49 t/ha) and followed by T5 where RDF (75%) + (25%) N through vermicompost was applied. RDF was 110:50:80 NPK kg/ha. Highest uptake of nitrogen (64.52 kg/ha), phosphorus (19.58 kg/ha) and potassium (57.50 kg/ha) were recorded in T7 where RDF (75%) + (25%) N through neem oil cake was applied. Highest post-harvest available nitrogen (328 kg/ha), phosphorus (27.3kg/ha) and potassium (268 kg/ha) were found in T11 where 25% N through FYM + 25% N through vermicompost+25% N through poultry manure+25% N through neem oil cake were applied. Whereas, lowest post harvest available nitrogen (292kg/ha), phosphorus (12.7kg/ha) and potassium (218kg/ha) were found in T7.