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Impacts of varied irrigation on field water budegts and crop yields in the North China Plain: Rainfed vs. irrigated double cropping system

Author

Listed:
  • Pei, Hongwei
  • Min, Leilei
  • Qi, Yongqing
  • Liu, Xingran
  • Jia, Yugui
  • Shen, Yanjun
  • Liu, Changming

Abstract

Groundwater irrigation has supported intensive agriculture in the North China Plain during the past four decades, but resulted in continued aquifer depletion. Reduce irrigation amount would be one of the actions to control the groundwater depletion. However, the impacts of reducing irrigation on the soil moisture and deep percolation have not been studied broadly. Therefore, this study employed long-term experiments via two irrigation plots (rainfed and irrigated) to assess the impacts of reducing irrigation on the soil water dynamics and percolation process in the double cropping fields. The following conclusions were reached in this study: (1) Irrigation reducing decreased the soil moisture in the unsaturated zone within the root zone, but increased the variations of soil moisture in the layer deeper than 500cm below the land surface. Meanwhile, there was a new dried soil layer in the 160–180cm depth below land surface for the irrigated double cropping field. (2) Irrigation increased mean annual deep percolation (Oct. 2011–Sep. 2015) from 1.3mmyr−1 to 116mmyr−1 compared to rainfed. At the same time, the maximum percolation rate for the rainfed crops was 0.03mmd−1 while the irrigated crops reached to 2.69mmd−1. The percolation decreased significantly from 140 to 190mmyr−1 to 40–89mmyr−1 as a result of water-saved irrigation strategy. (3) Irrigation has increased actual evapotranspiration and accelerated the field water cycle: mean annual evapotranspiration (double cropping system) increased from 454mmyr−1 beneath rainfed cropland to 671mmyr−1 beneath irrigated cropland during Oct. 2011–Sep. 2015, but decreased from 752 to 757mmyr−1 to 565–610mmyr−1 as a result of water-saved irrigation strategy. Overall, this research presents a multi-year visualization of the dynamics for soil moisture and deep percolation beneath rainfed and irrigated through the deep vadose zone. The assessments of irrigation and water-saved irrigation impacts on soil water profile and percolation are valuable for agricultural water management in these semi-arid regions fed by groundwater irrigation, globally.

Suggested Citation

  • Pei, Hongwei & Min, Leilei & Qi, Yongqing & Liu, Xingran & Jia, Yugui & Shen, Yanjun & Liu, Changming, 2017. "Impacts of varied irrigation on field water budegts and crop yields in the North China Plain: Rainfed vs. irrigated double cropping system," Agricultural Water Management, Elsevier, vol. 190(C), pages 42-54.
    • Handle: RePEc:eee:agiwat:v:190:y:2017:i:c:p:42-54
    DOI: 10.1016/j.agwat.2017.05.007
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    References listed on IDEAS

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    1. Xiao, Dengpan & Shen, Yanjun & Qi, Yongqing & Moiwo, Juana P. & Min, Leilei & Zhang, Yucui & Guo, Ying & Pei, Hongwei, 2017. "Impact of alternative cropping systems on groundwater use and grain yields in the North China Plain Region," Agricultural Systems, Elsevier, vol. 153(C), pages 109-117.
    2. Sun, Hongyong & Shen, Yanjun & Yu, Qiang & Flerchinger, Gerald N. & Zhang, Yongqiang & Liu, Changming & Zhang, Xiying, 2010. "Effect of precipitation change on water balance and WUE of the winter wheat-summer maize rotation in the North China Plain," Agricultural Water Management, Elsevier, vol. 97(8), pages 1139-1145, August.
    3. Zhang, Yongqiang & Kendy, Eloise & Qiang, Yu & Changming, Liu & Yanjun, Shen & Hongyong, Sun, 2004. "Effect of soil water deficit on evapotranspiration, crop yield, and water use efficiency in the North China Plain," Agricultural Water Management, Elsevier, vol. 64(2), pages 107-122, January.
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    1. Yang, Xiaolin & Jin, Xinnan & Chu, Qingquan & Pacenka, Steven & Steenhuis, Tammo S., 2021. "Impact of climate variation from 1965 to 2016 on cotton water requirements in North China Plain," Agricultural Water Management, Elsevier, vol. 243(C).

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