| Comprehensive risk zoning of dry-hot wind on winter wheat based on yield loss |
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| DOI：10.7606/j.issn.1000-7601.2019.02.34 |
| Key Words: winter wheat dry-hot wind grain filling state yield loss risk division |
| Author Name | Affiliation | | CHENG Lin | Key Laboratory of Agrometeorological Safeguard and Applied Technique in Henan Province/China Meteorological Administration, Zhengzhou， Henan 450003, China
Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China | | ZHANG Zhi-hong | Key Laboratory of Agrometeorological Safeguard and Applied Technique in Henan Province/China Meteorological Administration, Zhengzhou， Henan 450003, China
Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China | | Fang Wen-song | Key Laboratory of Agrometeorological Safeguard and Applied Technique in Henan Province/China Meteorological Administration, Zhengzhou， Henan 450003, China
Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China |
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| Abstract: |
| Studying the risk of damage caused by agrometeorology disaster has important significance for scientifically defending the disasters. The information including daily meteorology data, area information such as crop planting and irrigation, et al, for 118 counties, as well as yield, yield structure, and crop developmental phases at 30 agrometeorological observation stations were used. By resolving the meteorological yield and assuming an expected value for 1000-kernel weight, the meteorological yield of grain filling stage was separated, and then, indexes as risk index of yield reduction, variable coefficient of 1000-kernel weight, et al, were considered, the index of yield loss risk of dry-hot wind was established. The outcome of yield loss risk and climatic risk of dry-hot wind were integrated to zone the comprehensive hazard risk. The results showed that: the extracted meteorological yield of grain filling stage showed normal distribution, the average loss rate for the years of the hazard was 7.4% at the representative stations. The low risk area of yield loss including 43.3% of the whole stations, 36.7% and 20% for middle and high risk areas, respectively. The high value of comprehensive risk index, which was more than 0.5, distributed at Xiangcheng, Fangcheng, Xiping and Zhumadian, et al, where the high value of yield loss risk and climatic risk overlapped. The low risk region was located at Yichuang, Nangyang, Zhengzhou, Taikang and most of south of Huai-River in the Province. |
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