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Risk Assessment of Maize Yield Losses in Gansu Province Based on Spatial Econometric Analysis

Author

Listed:
  • Feng Fang

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Jing Wang

    (Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China)

  • Jingjing Lin

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Yuxia Xu

    (Faculty of Geography and Environment, Baoji University of Arts and Sciences, Baoguang Str. 44, Baoji 721013, China)

  • Guoyang Lu

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Xin Wang

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Pengcheng Huang

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Yuhan Huang

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

  • Fei Yin

    (Lanzhou Regional Climate Center, Lanzhou 730020, China)

Abstract

The frequent occurrence of meteorological disasters in China has caused huge losses to agriculture. Risk assessment serves as a bridge from disaster crisis management to disaster risk management. Therefore, it is necessary to carry out a refined comprehensive risk assessment of meteorological disasters in typical areas. However, several limitations remain in the disaster loss risk research, such as too coarse resolution and too single risk indicator. Additionally, less research has examined geographical information on risk clustering and barycenter migration, as well as temporal information on the sustainability of trends. Consequently, it is significant to unearth the geographical and temporal information on disaster loss and identify the refined spatial and temporal evolution pattern of crop risk. For this reason, we evaluated the risk of corn production in Gansu Province. First, based on maize yield data, a risk evaluation index system was constructed using the characteristics of variation trends, fluctuations, and extreme values of disaster losses. Then, the spatial distribution patterns and temporal evolution characteristics of maize production risks on a county scale in Gansu Province were determined using spatial analysis and climate diagnosis technology. The results show that there is a large interdecadal fluctuation in risk. In the 1980s, 1990s, 2000s, and 2010s, the average yield reduction rates of maize in Gansu Province were −11.8%, −12.6%, −8.7%, and −8.5%, and the proportions of counties with severe yield reduction were 34.8%, 44.4%, 20.8%, and 9.7%, respectively. Second, most counties belong to medium-low or low-risk areas for maize production. High-risk counties are primarily located in eastern and southern Gansu, whereas low-risk counties are mostly found along the Hexi Corridor. Third, most risk indicators exhibit some geographical aggregation. The Jiuquan region falls within the low-low-risk aggregation zone. In contrast, the Qingyang region is a high-high aggregation zone with a gradual expansion trend. Four, each risk indicator’s geographical barycenter migrates over a complicated path, but the direction and distance vary considerably. The comprehensive risk migrates along the south-northwest-southeast trajectory, albeit at a shorter distance. Five, the proportion of counties with a medium, medium-severe, severe, and total yield reduction tended to decline. In addition, the annual precipitation is significantly or very significantly correlated with most risk indicators and the comprehensive risk level. The results can guide agricultural production processes at all levels, as well as government disaster prevention.

Suggested Citation

  • Feng Fang & Jing Wang & Jingjing Lin & Yuxia Xu & Guoyang Lu & Xin Wang & Pengcheng Huang & Yuhan Huang & Fei Yin, 2023. "Risk Assessment of Maize Yield Losses in Gansu Province Based on Spatial Econometric Analysis," Agriculture, MDPI, vol. 13(7), pages 1-26, June.
  • Handle: RePEc:gam:jagris:v:13:y:2023:i:7:p:1280-:d:1176624
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    References listed on IDEAS

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