摘要
为了反映作物与干旱的相互关系,人为再现干旱灾害对作物产量的影响程度,选择华北地区冬小麦干旱灾害为研究对象,对作物生长模型WOFOST在区域上进行适应性进行分析、检验的基础上,然后利用区域作物模型实现干旱灾害对作物影响定量分析和动态评估。以减产率和气象条件作为灾害严重程度划分的标准,利用数值模拟试验,确定导致减产的主要气象因子及其量值,对研究区干旱灾害进行影响评估,包括典型灾害年份影响评估和年代际灾害影响评估,并给出了评估结果。
The crop growth models have the functions of reflecting the interaction of crops and climatic environment, describing the growing process of crops, and quantifying the relationship between crop growth and environmental factors. In this paper, the suitability of crop growth model WOFOST was analyzed and tested in regional scale based on experimental data. Localized model WOFOST was used to quantify and dynamically evaluate the drought disaster of winter wheat in North China. Applying the standard of yield reduction rate and calamity degree and numerical simulation experiments, the study determined the main meteorological factor which leads to yield reduction and conducted drought index of winter wheat. Based on the drought index, drought disaster at typical years and decadal drought disaster were evaluated.
出处
《生态学报》
CAS
CSCD
北大核心
2013年第6期1762-1769,共8页
Acta Ecologica Sinica
基金
国家科技支撑计划课题(2011BAD32B01)
公益性行业(气象)科研专项(GYHY201106021)
重庆市科技攻关项目(CSTC
2011AC1168)
关键词
作物生长模型
冬小麦
干旱
评估技术
crop growth model
winter wheat
drought
evaluation technology
