A Calculation Method of Winter Wheat Dry Hot Wind Insurance Weather Index

Abstract

The invention discloses a method for calculating winter wheat dry and hot wind insurance weather index. The method includes: extracting the original data of dry and hot wind; dividing the three stages of winter wheat grain filling, the early stage, the middle stage and the late stage, and the historical average duration of each stage; screening the corresponding raw data of the year when dry and hot wind appeared in different stages of grain filling, and determining the causes of dry and hot wind. construct a dry and hot wind insurance weather index; construct a regression model based on the relationship between the production reduction rate and dry and hot wind insurance weather index, and determine the weather index insurance premium rate; combined with the results of dry and hot wind disaster risk zoning, determine the revised premium rate of the insurance weather index. The present invention separates and segmentally processes the meteorological yield of winter wheat, and extracts the impact of meteorological disasters during the grain filling period, which is beneficial to scientifically identify the impact of a single disaster on yield; it makes up for the lack of insurance index products in the later stage of wheat growth, and is beneficial to It is of positive significance to avoid the risk of winter wheat dry hot wind disaster and protect the economic interests of growers.

Description

technical field [0001] The invention relates to the technical field of agricultural insurance, in particular to a method for calculating winter wheat dry and hot wind insurance weather index. Background technique [0002] Dry hot wind is the most serious agrometeorological disaster that harms grain filling in the late growth stage of winter wheat, and it is also one of the most important agrometeorological disasters that affect the stable and high yield of wheat in northern my country. It has a great impact on the thousand-grain weight and yield of wheat. Henan Province is a province with frequent dry and hot winds in winter wheat. According to historical statistics, the number of stations with young and heavy dry hot winds in the past 50 years accounted for 63.7 and 30.2% of the total number of stations, the average days were 1.9 days and 0.5 days, and the occurrence frequencies were 64 % and 23%. In recent years, the occurrence of hot and dry wind has tended to intensify....

AI Technical Summary

Problems solved by technology

At present, my country's existing wheat weather index insurance products not only aim at the comprehensive impact of disasters such as drought and frost in the whole growth period, but also have an index design for drought disasters in the main growth period. However, the weather index that can provide production guarantee for wheat in the later stage Products are still lacking

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