Vol. 11, Issue 4 (2022)

Author(s):
Mohammed Azharuddin BR, Bandiwaddar TT, Durgannavar FM and Shaila HM

Abstract:
A field experiment was conducted at MARS, University of Agricultural Sciences, Dharwad during rabi 2020-21. The experiment was laid out in split plot design under rainfed and irrigated ecosystems as main plots and nutrient omission treatments as subplots replicated thrice. The results indicated that significantly higher plant height (236.0cm), leaf area (45.09 dm² plant^-1), leaf area index (6.67), dry matter accumulation (214.79g plant^-1) and grain yield (44.87 q ha^-1) of rabi sorghum were recorded under irrigated condition. Among nutrient omissions, application of 50:25 kg NP ha^-1 + FYM @ 3 t ha^-1 + ZnSO₄ @ 15 kg ha^-1 recorded significantly higher plant height (243.50 cm), leaf area (50.35 dm² plant^-1), leaf area index (7.45), dry matter accumulation (242.56 g plant^-1), grain yield (49.56 q ha^-1). Per cent increased in grain yield of sorghum was 18.96 under irrigated condition over rainfed ecosystem. Further, application of 50:25 kg NP ha^-1 + FYM @ 3 t ha^-1 + ZnSO₄ @ 15 kg ha^-1 recorded 34.88 per cent increase in grain yield as against the treatment received none of the nutrients. Omission of N resulted in 26.65 per cent, omission of P and NP resulted in 12.3 per cent and 31.88 per cent reduction, respectively in grain yield of rabi sorghum.