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Maize productivity analysis in response to climate change under different nitrogen management strategies

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Title Maize productivity analysis in response to climate change under different nitrogen management strategies
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Creator Nishant K Sinha, M. Mohanty, J. Somasundaram, R. S. Chaudhary, H. Patra, K. M. Hati, Rana Pratap Singh, Jyoti Kumar Thakur, Jitendra Kumar, Dhiraj Kumar, Alka Rani, A. B. Singh, S. K. Bal, K. Sammi Reddy and M. Prabhakar
 
Subject Maize, nitrogen management, modelling, climate change, APSIM
 
Description Not Available
The evaluation of climatic change impact on maize grain and biomass yield under different N
management practices through a well-calibrated and validated APSIM model in Vertisol of central India has been made. Climate scenarios were derived from seven global climate models (GCM) for two representative concentration pathways (RCPs), i.e. RCP4.5 and RCP8.5, and two-time slices, i.e. 2050 and 2080. The five N scenarios, namely N0%, N50%, N100%, N150%, and 100% organic, were studied in different climatic scenarios. The probability of exceedance showed that N0%, N50%, N100%, N150%, and 100% organic treatments have a 50% chance of yield greater than 1.0, 3.40, 4.20, 4.45 and 3.84 t ha-1, respectively. The average reduction of maize yield was -44.4, -20, -19.7 - 17.9 and 22.5 per cent in N 0%, N 50%, N 100%, N 150%, 100% organic, respectively under RCP4.5 over the baseline period (1980-2010). For RCP8.5, the average reduction of maize yield in N 0%, N 50%, N 100%, N 150%, 100% organic was 41.2, 21.2, 20.8 20.6 and 23.1 per cent, respectively. Simulation results suggested that a higher decrease of maize yield in 100 per cent organic treatments than inorganic treatments is due to variability in N uptake.
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Date 2021-08-31T05:12:50Z
2021-08-31T05:12:50Z
2021-09-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/61064
 
Language English
 
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Publisher Not Available