辽西地区小麦干热风气候特征及其防御对策

[目的]研究小麦干热风天气特点、发生规律和区域分布,为辽西地区小麦优质栽培提供气象科学依据。[方法]用相关分析筛选干热风的气象因子和危害指标;采用归类、叠加确定干热风天气类型;用系统聚类方法对辽西地区干热风区域划分。[结果]TG≥35℃、V≥3 m/s、R≥11.0 mm、E≤40%出现天数是辽西地区干热风指标。梅雨型、两槽一脊型和南高北低型天气特点是发生干热风的主要形式场。羊山、喀左、朝阳、叶柏寿是小麦干热风易发生区域。[结论]增加工程设施、改变农业技术和使用生物化学措施等防御对策,可减轻干热风对小麦的危害。

Climatic Characteristics of Hot-arid Wind for Wheat in Western Liaoning and Its Defensive Countermeasures

[Objective] The research aimed to study the characteristics,occurrence laws and regional distribution of hot-arid wind weather for wheat and to provide scientific meteorological basis for the good-quality wheat cultivation of wheat in western Liaoning.[Method] The meteorological factors and hazard index were screened by using the correlation analysis.The types of hot-arid wind weather were confirmed by using classification and superposition.The regions of hot-arid wind in western Liaoning were divided by us...