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• W2381892313 abstract "Concerns about increasing greenhouse gases concentration in the atmosphere and sustainability of fossil fuel use in the context of advance in biomass conversion technology have renewed interest in crop residue as a type of biofuel. This would be greatly useful for securing energy supply and mitigating global warming as well. Crop residue, as a major biomass energy used in China’s rural areas, may play a more important role in contributing to renewable energy needs due to its greater quantity produced each year. Therefore, its magnitude and geographical distribution need to be better understood, particularly the impacts induced by climate change. Climate change might impose impacts on crop residue through inducing positive or negative effects on potential biomass and yield, or through changing its geographical patterns. Three major crops (i.e., maize, rice and wheat) produce a sufficient quantity of residue each year for supporting commercial production in China. We simulated biomass yield of the three crops by the CERES crop model at a 50 km×50 km resolution, and subsequently computed the mass quantity of harvested residues for the whole country. Magnitude and spatial distribution were extensively investigated under two scenarios: with and without climate change. A climate scenario (BS, 1961-1990) simulated by PRECIS regional climate model with current greenhouse gases concentration (380 ppm) was used to represent current climate, and a scenario (B2, 2011-2100) with low to middle greenhouse gases emission (CO2 concentration increases from 388 ppm in 2011 to 604 ppm in 2100) stands for climate change. Results demonstrate that 1) the quantity of the three crop residue of China would decrease in the 2020s, but increase in the 2050s and 2080s. Climate change would likely decrease the biomass yields and residues on average for rice. Residues of maize, particularly for wheat, would reveal improvement in productivity under climate change. Reasons for such different changes between crops could be ascribed to various combinations of geographical distributions of crops, climatic characteristics, management practices, and asymmetric impacts of global warming on phenology of crops (i.e., vegetative or reproductive period); 2) the inter-annual variation in residue yields would increase in the future. This highlights an increasing variability and possibility of unstable biomass supply due to global warming; and 3) geographical patterns of biomass would vary greatly and regionally. The Northern China Plain would present the largest increase in gains under climate change due in part to its largest proportion of winter wheat cultivation whose biomass and yield can benefit substantially from climate warming. The yield of crop residue in Northeast China, particularly over the eastern part, would decrease dramatically under climate change. This is as a consequence of a larger rice production area, and rice biomass and yield being constrained by global warming." @default.
• W2381892313 created "2016-06-24" @default.
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• W2381892313 date "2010-01-01" @default.
• W2381892313 modified "2023-09-24" @default.
• W2381892313 title "Impacts of Climate Change on Residue Resources of Main Crops in China" @default.
• W2381892313 hasPublicationYear "2010" @default.
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