摘要
本文以作物根系层土壤含水率为基础建立了作物干旱指标模型，并综合考虑作物不同生育阶段水分条件对作物的影响，引进敏感系数，建立了干旱等级模型；研究了黄河流域于旱的地域性、季节性、持续性等特征，并对黄河流域区域干旱进行了分析。
drought index model is estabished in the paper on the basis of soil moisture conternt of crop rootstock layer,and a drought grade model is also established by using the sensitiveness coefficient under the comprehensive consideration of the influence of moisture to crop in different growth periods.After the study of the regional distribution, change in seasons, continuence and other characters of drought in Yellow River basin,the paper analyzed the drought in this region.
出处
《人民黄河》
北大核心
1996年第6期7-12,共6页
Yellow River
关键词
农作物
干旱
含水率
生育期
黄河流域
Yellow River basin
moisture content
sensitiveness coefficient
drought index
drought grade
crop growth period
drought character
