晋南冬麦区干热风发生特点及其对产量影响分析

为了明确晋南冬麦区干热风发生特点及其对小麦的逆境胁迫影响,利用临汾市气象局1991-2016年5月下旬和6月上旬及6月11日-15日的干热风发生天数资料以及2012-2016年小麦区域试验产量资料,分析了该区的干热风发生特点及其对当地小麦产量的影响。结果表明：晋南冬麦区干热风发生频繁且严重,在小麦灌浆期每年都会不同程度地遭受干热风危害，天数变幅为2天～13天,灌浆期内干热风发生对小麦产量的影响呈累加作用,尤其6月上旬干热风发生天数对小麦产量影响相对较大。

Dry-hot Wind: Occurrence Characteristics and Its Impact on Yield in Winter Wheat Area of Southern Shanxi

The paper aims to clarify the occurrence characteristics of dry-hot wind and its influence on wheat to adversity stress in the winter wheat area of southern Shanxi. Based on the occurrence days of dry-hot wind data in the 10 days respectively in early, middle and late May and the 10 days in early June and 11-15 of June and the wheat yield data from 1991 to 2016, the authors analyzed the occurrence characteristics and influence of dry-hot wind on local wheat yield by the SPSS software. The results showed that: dry-hot wind occurred frequently and seriously in the winter wheat area of southern Shanxi in different degrees every year at wheat filling stage, and the occurrence days ranged from 2 to 13; at the filling stage, the dry- hot wind had accumulative effect on wheat yield, and especially the dry-hot wind occurred in the early 10 days of June had relatively large effect on wheat yield.