河套地区初终霜日变化趋势分析及霜冻预防

利用巴彦淖尔市河套地区5个站40a(1971—2010年)的逐年最低气温资料,用统计学方法 ,对河套地区近40a的初、终霜出现日期和无霜期的变化特征进行分析。结果表明:河套地区初霜日日期推后,终霜日日期提前,无霜期逐步延长,霜冻灾害呈逐年减少趋势。通过具体数据分析,有助于了解河套地区霜冻气候的变化特征,为霜冻灾害的预测预防和农作物的种植结构调整提供一定的参考。

Analysis of the Diurnal Variation Trend of the Initial and Final Frost and Frost Prevention in Hetao Region

Using the annual minimum air temperature data for 40 years（from 1971 to 2010） of 5 meteorological stations in Hetao area of Bayan Nur City, variation characteristics about the initial（Autumn）and final（Spring） frost date and frost-free season in the Hetao area in recent 40 years were analyzed though the statistical method. The results showed that the Hetao area initial frost date was pushed back, and final frost date was bring forward. In other words, frost-free season gradually extended, and frost disaster decreasing year by year. Through the analysis of data, it can help us to understand the characteristics of frost climate change in Hetao area, so that it can provide a reference for the frost disaster forecast and plantation structural adjustment of crops in the crop planting.