[1]Wu Yaxin,He Qijin,Liu Jiahong,et al.Assessment on Risk of Gale Disaster in Different Growth Stages of Summer Maize in North China Plain[J].Research of Soil and Water Conservation,2024,31(03):257-264,275.[doi:10.13869/j.cnki.rswc.2024.03.022]
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Assessment on Risk of Gale Disaster in Different Growth Stages of Summer Maize in North China Plain
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
257-264,275
Column:
Public date:
2024-04-30
- Title:
- Assessment on Risk of Gale Disaster in Different Growth Stages of Summer Maize in North China Plain
- Keywords:
- summer maize; gale disaster; gale days; hazard
- CLC:
- S162.2
- DOI:
- 10.13869/j.cnki.rswc.2024.03.022
- Abstract:
- [Objective] Gale disaster is one of the main meteorological disasters that restrict social and economic development. The aim of this study is to scientifically assess the risk of gale disaster, which is of great significance for disaster prevention and mitigation of summer maize production. [Methods] Based on the spatial and temporal distribution characteristics of maximum wind speed and gale days at different growth stages of summer maize after jointing, the regionally applicable gale lodging discriminant indexes of summer maize were screened and verified by historical lodging cases, and the risk of gale lodging at different growth stages of summer maize in North China Plain was evaluated by risk zoning method. [ Results](1)From 1980 to 2019, the maximum wind speed and gale days after jointing of summer maize in the North China Plain showed a significant fluctuating downward trend, and gradually decreased from the east to the middle and west in space.(2)Mild lodging was the main lodging type of summer maize after jointing, and the regional average lodging probability was 44.5%, and the probability of severe lodging was the lowest(7.8%). The jointing-tasseling stage was most prone to lodging.(3)The probability of gale lodging after jointing of summer maize showed a decreasing trend, but after 2011, the gale lodging in the jointing-tasseling period in some areas showed an extreme trend.(4)The risk distribution of summer maize gale disaster showed a decreasing trend from east to west. The eastern part was a high-risk area, most of the central part was a medium-risk area, and the northern and western parts are low-risk areas. [Conclusion] Although the maximum wind speed and the number of gale days have shown a downward trend in recent years, the lodging of summer maize in some areas of the North China Plain has intensified, and it is necessary to strengthen the construction of disaster prevention and mitigation.
- References:
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Last Update:
2024-04-30