Abstract:

In order to transfer and reduce the drought risk in the Weibei region, and ensure economic income and food production security for farmers, meteorological data, spring maize yield and growth period from 1990 to 2020 for 23 counties of the Weibei region were used in this study. The model between drought index and yield reduction rate was established in the specific growth period. Then the spring maize drought weather index insurance product in the Weibei region was designed and the pricing research was carried out. Therefore, the insurance rate was adjusted by using the drought risk assessment results in case to reduce the basis risk. The results showed that: (1) the seedling-milk ripe stage was the key period of water demand for spring maize in the Weibei region. And there was a significant linear relationship between drought index (I) and yield reduction rate (D) during this growth period: D=0.383I−3.959 (P<0.05). (2) The precipitation during the seedling-milk ripe period decreased from northwest to southeast while the drought risk increased from northwest to southeast. And the drought risk in southeast was higher than that in the northwest. (3) Based on the drought yield reduction rate model and the insurance regulations, 40% of the drought index was taken as the compensation trigger value. Then the different drought index compensation standards were determined, and the adjusted insurance rates were between 6.9%−8.9% and the premiums were 375−480 Yuan per hectare based on the drought risk assessment results. This study can provide a scientific basis for the Weibei spring maize weather index insurance products designation, premium pricing, and basis risk effectively reduction. 

Key words: Weibei region, Spring maize, Drought, Risk, Weather index insurance