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Impacts of wheat photosynthate allocation on soil N2O emission during post-anthesis period

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Abstract

Both spikelet removal and low temperature stress largely reduced photosynthate allocation to wheat grain; the former stimulated the average N2O emissions by 31.3% and 33.2% under the field and pot conditions; the latter increased average N2O emission by 19.9% under pot condition. Spikelet removal and low temperature stress significantly reduced total plant N uptake, thereby increasing soil NO3-N content, and increased root biomass. Our findings indicated that photosynthate allocation affects the soil N2O emissions from wheat fields through altering plant N uptake and root growth, and suggest that promoting photosynthate allocation to grain may not only benefit higher wheat yield but also mitigate greenhouse gas emissions.

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Funding

This work was financially supported by the National Key Research and Development Program China (2016YFD0300803), the Chinese Nature Science Foundation (31201179), the Special Fund for Agro-scientific Research in the Public Interest (201503116-10), and the Innovation Program of CAAS.

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Correspondence to Chengyan Zheng.

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Deng, A., Zhang, X., Zhang, X. et al. Impacts of wheat photosynthate allocation on soil N2O emission during post-anthesis period. Biol Fertil Soils 55, 643–648 (2019). https://doi.org/10.1007/s00374-019-01377-4

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  • DOI: https://doi.org/10.1007/s00374-019-01377-4

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