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A Yield-Related Agricultural Drought Index Reveals Spatio-Temporal Characteristics of Droughts in Southwestern China

Author

Listed:
  • Lu Wu

    (College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China)

  • Liping Feng

    (College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China)

  • Yizhuo Li

    (College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China)

  • Jing Wang

    (College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China)

  • Lianhai Wu

    (Sustainable Agriculture Systems, Rothamsted Research, North Wyke, Okehampton EX20 2SB, UK)

Abstract

Southwestern China (SWC), one of the major rain-fed wheat production zones in China, has become vulnerable to drought in recent years under global climate change. To quantify drought severity during the wheat growing season and its impact on yield loss, we selected the Agricultural Production Systems sIMulator (APSIM) model to simulate wheat growth between 1961 and 2010 in SWC. A new drought index was developed considering different weighting factors of drought for yield loss in three growing phases. The index was shown to be reliable in assessing drought severity in the region. On average, an abnormal drought mainly occurred in mid-west Guizhou with a frequency of 10–30%. Central SWC was subjected to moderate drought with a frequency of 10–30%, whereas severe drought often occurred in Southern Sichuan and the middle of Yunnan with a frequency >50%. Temporally, drought severity fluctuated before 1990, but increased significantly afterwards. Our assessment suggested that irrigation during the period from floral initiation to flowering would help to ameliorate the effects of water stress under climatic variability in the region.

Suggested Citation

  • Lu Wu & Liping Feng & Yizhuo Li & Jing Wang & Lianhai Wu, 2019. "A Yield-Related Agricultural Drought Index Reveals Spatio-Temporal Characteristics of Droughts in Southwestern China," Sustainability, MDPI, vol. 11(3), pages 1-13, January.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:3:p:714-:d:201834
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    References listed on IDEAS

    as
    1. L Liu & Z. X. Xu, 2016. "Regionalization of precipitation and the spatiotemporal distribution of extreme precipitation in southwestern China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 1195-1211, January.
    2. X. Zhang & Y. Yamaguchi, 2014. "Characterization and evaluation of MODIS-derived Drought Severity Index (DSI) for monitoring the 2009/2010 drought over southwestern China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(3), pages 2129-2145, December.
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