Abstract:

According to the river set the inquisition data and same period weather data that infuse main cash crop sunflower of area to suffer the frost influence through the years, make sure the weather index sign of the sunflower frost, and adopt to statistics an analytical method, to the river set the occurrence regulation that infuse the area everyplace frost carried on analysis. Express as a result that the frost be over time, delay toward the northeast region from the southwest; Everyplace frost variety trend different, but total the trend is gradual advance; The frost variety regulation and air temperature change the regulation dissimilarity, to the influence aggrandizement of the farm crop.