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Response of first flood irrigation timing after rice dry-direct-seeding: Productivity and greenhouse gas emissions in Central China

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  • Jiang, Qingwei
  • Wang, Weiqin
  • Chen, Qian
  • Peng, Shaobing
  • Huang, Jianliang
  • Cui, Kehui
  • Nie, Lixiao

Abstract

A major challenge in rice (Oryza sativa L.) production is to simultaneously achieve the goals of reducing water consumption, labor requirements and greenhouse gas (GHG) emissions while maintaining a sustainable grain yield. Dry direct-seeded rice (DDSR) has been proposed as an alternative rice production strategy because it reduces water consumption and labor requirements and increases system productivity. To evaluate the responses of grain yield, yield components, water productivity and GHG emissions to different first flood irrigation times under DDSR, field experiments were conducted under three different first-irrigation times: 15, 30 or 45days after sowing (DAS) in 2014 and 15, 35 or 55 DAS in 2015. The precipitation in the 45 DAS was 291mm in 2014 and 160mm in 2015. The results indicated that the grain yields under DDSR were not affected by the different flooding times in 2014 but were significantly reduced when the first flood irrigation time was prolonged to 55 DAS in 2015. Delaying the first flood irrigation time after sowing conserved water and significantly increased water productivity (WP) under DDSR. Prolonging the first flood irrigation time after sowing markedly decreased the CH4 gas emission, although delaying the first flood irrigation time increased the N2O gas emission, the global warming potential was significantly reduced. Based on these findings, we put forward the recommendation that the timing of first flood irrigation can be postponed to 45 DAS with precipitation levels higher than 160mm under DDSR in central China. However, long-term studies across different environments are inevitable to get definite conclusions.

Suggested Citation

  • Jiang, Qingwei & Wang, Weiqin & Chen, Qian & Peng, Shaobing & Huang, Jianliang & Cui, Kehui & Nie, Lixiao, 2016. "Response of first flood irrigation timing after rice dry-direct-seeding: Productivity and greenhouse gas emissions in Central China," Agricultural Water Management, Elsevier, vol. 177(C), pages 241-247.
  • Handle: RePEc:eee:agiwat:v:177:y:2016:i:c:p:241-247
    DOI: 10.1016/j.agwat.2016.08.006
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    References listed on IDEAS

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    1. Liang, Kaiming & Zhong, Xuhua & Huang, Nongrong & Lampayan, Rubenito M. & Pan, Junfeng & Tian, Ka & Liu, Yanzhuo, 2016. "Grain yield, water productivity and CH4 emission of irrigated rice in response to water management in south China," Agricultural Water Management, Elsevier, vol. 163(C), pages 319-331.
    2. Totin, Edmond & Stroosnijder, Leo & Agbossou, Euloge, 2013. "Mulching upland rice for efficient water management: A collaborative approach in Benin," Agricultural Water Management, Elsevier, vol. 125(C), pages 71-80.
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    1. Feng, Z.Y. & Qin, T. & Du, X.Z. & Sheng, F. & Li, C.F., 2021. "Effects of irrigation regime and rice variety on greenhouse gas emissions and grain yields from paddy fields in central China," Agricultural Water Management, Elsevier, vol. 250(C).
    2. Monaco, Federica & Sali, Guido, 2018. "How water amounts and management options drive Irrigation Water Productivity of rice. A multivariate analysis based on field experiment data," Agricultural Water Management, Elsevier, vol. 195(C), pages 47-57.
    3. Evans Asenso & Luyong Zhang & Lingmao Tang & Fuseini Issaka & Kai Tian & Jiuhao Li & Lian Hu, 2019. "Moldboard Plowing with Direct Seeding Improves Soil Properties and Sustainable Productivity in Ratoon Rice Farmland in Southern China," Sustainability, MDPI, Open Access Journal, vol. 11(22), pages 1-12, November.

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