晋南冬麦区干热风发生特点及其对产量影响分析

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

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月上中下旬、6月上旬、6月11—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,运用SPSS软件,分析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2~13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。

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