Vol. 11, Special Issue 12 (2022)

Author(s):
Gauthami Kayarga, Naveen NE, Rudragouda FC, Chaitanya HS and Jayaprakash SM

Abstract:
A field experiment was conducted during kharif and rabi 2021-22 at Zonal Agricultural and Horticultural Research Station, Brahmavara, Udupi, Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga, on sandy loam soil to study the effect of varied levels of Salvinia molesta vermicompost on yield, post-harvest soil nutrient status and economics of paddy-groundnut cropping system in Udupi district of Coastal Karnataka. The experiment was laid out in RCBD (Randomized Complete Block Design) with five treatment combinations, replicated four times. The study revealed that application of 13.2 t ha^-1 Salvinia molesta vermicompost + 45: 30: 75 kg N: P₂O₅: K₂O ha^-1 achieved maximum grain yield (5231 kg ha^-1), straw yield (6657 kg ha^-1) in paddy during kharif and pod yield (1598 kg ha^-1), kernel yield (1134 kg ha-1) in groundnut during rabi due to the residual effect of added treatment and it was at par with the application of 9.9 t ha-1 Salvinia molesta vermicompost + 45: 30: 75 kg N: P₂O₅: K₂O ha^-1. With respect to post-harvest soil nutrient status higher available nutrients (N- 293.67 kg ha-1, P₂O₅- 37.59 kg ha^-1 and K₂O- 201.64 kg ha^-1 were recorded in the treatment 13.2 t ha-1 Salvinia molesta vermicompost + 45: 30: 75 kg N: P₂O₅: K₂O ha^-1. Due to the impact of the above factors, treatment application of 9.9 t ha-1 Salvinia molesta vermicompost + 45: 30: 75 kg N: P2O5: K2O ha-1 achieved maximum net returns (₹ 113511 ha^-1) and economic efficiency (₹ 732 ha-1day^-1) in paddy-groundnut cropping system under coastal ecosystem of Udupi, Karnataka.