Title : Influence of organic nutrient sources on nutrient uptake and soil fertility in green gram (Vigna radiata) under organic farming
Abstract:
A field experiment was conducted during the rabi season of 2020–21 at the Organic Farm of Navsari Agricultural University, Navsari, to study the effect of different organic nutrient sources on nutrient uptake and post-harvest soil fertility of green gram (Vigna radiata) under organic farming conditions. Twelve treatments comprising 100% recommended dose of nitrogen (RDN) through NADEP compost, vermicompost and ghan-jivamrut, alone and in combination with foliar application of enriched banana pseudostem sap (EBPS), cow urine and vermiwash, were evaluated in a randomized block design. Organic manures were applied at sowing, while foliar sprays were given at 15, 30 and 45 days after sowing. The results revealed that nutrient content (N, P and K) in grain and stover was not significantly influenced by the treatments. However, nutrient uptake by grain and stover differed significantly among treatments. Application of 100% RDN through vermicompost along with EBPS at 1% concentration recorded significantly higher uptake of nitrogen, phosphorus and potassium by green gram. Post-harvest soil analysis showed non-significant differences among treatments for organic carbon and available N, P2O5 and K2O, though higher values were observed under vermicompost-based treatments. The study concluded that 100% RDN through vermicompost combined with EBPS (1%) is an effective organic nutrient management practice for improving nutrient uptake and sustaining soil fertility in green gram.
Keywords: Green Gram, Organic Farming, Vermicompost, Enriched Banana Pseudostem Sap (EBPS), Nutrient Uptake, Soil Fertility
