Influence of summer legume residue recycling and varietal diversification on productivity,energetics, and nutrient dynamics in basmati rice–wheat cropping system of western Indo-Gangetic Plains |
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| Authors: | Vijay Pooniya R S Bana K Sawarnalaxmi Pankaj D S Rana |
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| Institution: | 1. Division of Agronomy, ICAR – Indian Agricultural Research Institute, New Delhi, India;2. CSIRO, Queensland Bioscience Precincts, University of Queensland, St Lucia, Australia;3. Division of Microbiology, ICAR – Indian Agricultural Research Institute, New Delhi, India;4. Division of Nematology, ICAR – Indian Agricultural Research Institute, New Delhi, India;5. International Rice Research Institute (IRRI) India Office, New Delhi, India |
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| Abstract: | A field experiment was conducted on summer mungbean residue recycling (SMBRR) and basmati rice–wheat cropping system (BRWCS) at New Delhi, India. The SMBRR enhanced the system productivity and net returns by ～19.1% and 22.1% compared to summer fallow (SF) with highest magnitude under genotypic sequence of P 2511/HD 2967. Two genotypes each in basmati rice (PB 1 and P 2511) and wheat (HD 2967 and HD 2733) responded well to SMBRR with respect to grain yield efficiency index (GYEI) ≥ 1.0. SMBRR also registered ～13.5% higher microbial biomass carbon (MBC) than SF. Soil organic carbon (SOC) storage also increased by ～6.8% in 0–30 cm soil layer. The rice–wheat–summer mungbean system produced significantly highest energy efficiency compared to the rice–wheat–summer fallow system with highest values under genotypic sequence of P 2511/HD 2967 as a result of better yield expression. Overall, SMBRR with suitable genotypic sequence improved the system productivity, profitability, and nutrient dynamics in BRWCS, which are vital for long-term sustainability of this system. |
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| Keywords: | basmati rice–wheat cropping system genotypic diversification grain yield efficiency index mungbean residue recycling nutrient dynamics productivity |
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