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Integrated rice-duck farming decreases global warming potential and increases net ecosystem economic budget in central China

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Abstract

Over the past decades, many attempts have been made to assess the effects of integrated rice-duck farming on greenhouse gas emissions, use efficient of energy, soil fertility, and economic significance. However, very few studies have been focused on the effects of the farming on net ecosystem economic budget (NEEB). Here, a 2-year field experiment was conducted to comprehensively investigate the effects of ducks raised in paddy fields on CH4 and N2O emissions, global warming potential (GWP), rice grain yield, and NEEB in central China. The experiment included two treatments: integrated rice-duck farming (RD) and conventional rice farming (R). The introduction of ducks into the paddy fields markedly increased the rice grain yield due to enhanced tiller number and root bleeding rate. RD treatment significantly elevated the N2O emissions (p < 0.05) but decreased CH4 emissions (p < 0.05) during rice growing seasons compared with R treatment. Analysis of GWP based on CH4 and N2O emissions showed that compared with R treatment, RD treatment significantly decreased the GWP by 28.1 and 28.0% and reduced the greenhouse gas intensity by 30.6 and 29.8% in 2009 and 2010, respectively. In addition, RD treatment increased NEEB by 40.8 and 39.7% respectively in 2009 and 2010 relative to R treatment. Taken together, our results suggest that the integrated rice-duck farming system is an effective strategy to optimize the economic and environmental benefits of paddy fields in central China.

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Acknowledgements

We sincerely thank Dr. Philippe Garrigues, the Editor, and anonymous referees for their constructive suggestions and critical comments on the original manuscript.

Funding

This work is funded by the National Key Research and Development Project of China (2017YFD0301403), Natural Science Foundation of China (31471454, 31671637, 31670447), and Natural Science Foundation of Hubei Province (2016CFA017).

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Authors and Affiliations

  1. MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River/College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China

    Feng Sheng, Cou-gui Cao & Cheng-fang Li

  2. Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, The College of Life Sciences, Hubei University, Wuhan, 430062, China

    Feng Sheng

  3. Hubei Collaborative Innovation Center for Grain Industry, Yangtze University, Jingzhou, 434023, Hubei, People’s Republic of China

    Cou-gui Cao & Cheng-fang Li

Authors
  1. Feng Sheng
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  2. Cou-gui Cao
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  3. Cheng-fang Li
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Corresponding authors

Correspondence to Cou-gui Cao or Cheng-fang Li.

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Responsible editor: Philippe Garrigues

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Sheng, F., Cao, Cg. & Li, Cf. Integrated rice-duck farming decreases global warming potential and increases net ecosystem economic budget in central China. Environ Sci Pollut Res 25, 22744–22753 (2018). https://doi.org/10.1007/s11356-018-2380-9

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  • DOI: https://doi.org/10.1007/s11356-018-2380-9

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