Winter wheat dry-hot wind insurance weather index calculation method

Abstract

The invention discloses a winter wheat dry-hot wind insurance weather index calculation method. The method comprises the following steps: the raw data of dry-hot wind are extracted; winter wheat grainfilling is divided into three stages: the early filling stage, the middle filling stage and the late filling stage, and the historical average lasting days of each stage are also divided; the corresponding raw data of the dry-hot wind years in different stages of grain filling are screened so as to determine the yield reduction rate caused by the dry-hot wind; the dry-hot wind insurance weather index is constructed; the regression model is established according to the relationship between the yield reduction rate and the dry-hot wind insurance weather index so as to determine the weather index insurance premium rate; and the revised premium rate of the insurance weather index is determined through combination of the result of dry-hot wind disaster risk zoning. Separation and segmentationof the meteorological yield of the winter wheat are performed and the influence of the meteorological disaster during the filling stage is extracted so as to be favorable for scientifically identifying the influence of the single disaster species on the yield; and the situation of lack of insurance index products in the late growth stage of the wheat can be compensated so as to have a positive significance to avoid the dry-hot wind disaster risk of the winter wheat and protect the economic interests of farmers.

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....

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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

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