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沙尘天气对北方设施蔬菜生产的影响与对策

发布者:zhanglaoshi        发布时间:2019-08-21 13:25:06

沙尘天气对北方设施蔬菜生产的影响与对策

作者:宋继昌来源:《现代农业科技》2013 年第 19 期

摘要冬春季节北方沙尘天气过程次数呈逐年递增趋势,并且波及的范围愈来愈广,不仅影响了人们的生活和身心健康,而且影响了设施蔬菜的正常生产。介绍了沙尘天气的特点,分析沙尘天气对设施蔬菜生产的影响,并提出对策,以供参考。

关键词沙尘天气;设施蔬菜;影响;对策;北方

中图分类号 S626 文献标识码 A 文章编号 1007-5739(2013)19-0282-02

Effect and Countermeasures of Facilities Vegetable Production in the North Area by Sand and Dust Weather

SONG Ji-chang

(Agriculture Demonstration Park Management Committee of Huzhu County in Qinghai Province,Huzhu Qinghai 810500)

Abstract The process of dust weather area in the North in the winter and spring are showed a trend of increasing year by year, and spread more and more widely, which not only affects people′s life and health of body and mind, but also affects the normal production of facilities vegetables.

Characteristics of sand and dust weather were introduced and effect of facilities vegetable production by sand and dust weather were analyzed.

Countermeasures were put forward so as to provide the reference .

Key words sand and dust weather;facilities vegetables;

effect;

countermeasures;

North area

沙尘天气是我国西北地区和华北北部地区在冬春季节出现的灾害性天气。形成沙尘天气有两大因素,一是风源,二是尘源。人们不能限制风这种客观存在的自然力,只能解决尘源问题。我国约有 174 万 km2 的沙化地,只有 53 万 km2 可治理,通过治理,可以减轻、减弱沙尘天气。其余 121 万 km2 的原生沙漠和戈壁,仍会造成沙尘天气。另外,境外的沙化地也会影响我国的天气,只要有沙源地存在,沙尘天气就不会消失。因此,研究沙尘天气的防范措施, 以降低对农业生产特别是设施蔬菜生产的影响意义重大。

1 沙尘天气特点

沙尘天气按能见度分为浮尘、扬沙、沙尘暴和强沙尘暴 4 类。浮尘是指尘土、细沙均匀地浮游在空中,使水平能见度小于 10 km 的天气现象;扬沙是指风将地面尘沙吹起,使空气相当

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