Biology and Fertility of Soils

, Volume 55, Issue 1, pp 89–96 | Cite as

Effects of reduced chemical fertilizer combined with straw retention on greenhouse gas budget and crop production in double rice fields

  • Wei Wang
  • Chunlan Chen
  • Xiaohong Wu
  • Kejun Xie
  • Chunmei Yin
  • Haijun Hou
  • Xiaoli Xie
Short Communication


A two-year field investigation was conducted in a typical double rice region in South China. The treatments included conventional dose of nitrogen, phosphorus, and potassium fertilizers (NPKc); reduced chemical fertilizer combined with straw retention (NPKr+S); and no fertilizer as a control (CK). The global warming potential (GWP) was evaluated with nitrous oxide (N2O) and methane (CH4) emissions. The results showed that fertilization enhanced not only CH4 but also N2O emissions. For CK, NPKc, and NPKr+S, respectively, annual N2O emissions were 0.09, 0.47, and 0.33 kg ha−1; and annual CH4 emissions were 562.4, 657.9, and 882.2 kg ha−1. Consequently, the GWPs were 19,146, 22,507, and 30,094 kg CO2-eqv ha−1 year−1 for CK, NPKc, and NPKr+S, respectively. As rice grain yields were comparable between NPKc (9332 kg ha−1 year−1) and NPKr+S (9261 kg ha−1 year−1), the greenhouse gas intensity (GHGI) was significantly lower in NPKc compared with that in NPKr+S which induced more GWP. Overall, this study showed the potential of straw retention to reduce chemical fertilizer use. But it increased the GWP by 33.7% and GHGI by 34.7% in double rice systems under continuous flooding regime.


Fertilization Straw incorporation Methane Nitrous oxide Global warming potential Greenhouse gas intensity 


Funding information

This work was supported by the National Natural Science Foundation of China (grant numbers 41503081 and 41401292), the National Key Research and Development Plan (grant number 2016YFD0201205-4), and the Natural Science Foundation of Hunan Province, China (grant number 2018JJ3878).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
  2. 2.College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangshaChina
  3. 3.Hunan Agricultural Resources and Environmental Protection Management StationChangshaChina

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