摘要
从作物水分供需出发,构建湖南省晚稻干旱指数模型,通过典型年份干旱指数与相应的旱情资料对比分析,确定了湖南晚稻干旱等级指标,并利用该模型分析湖南不同区域在晚稻各个生育阶段的干旱情况。就生长阶段而言,快速生长期、生长中期、成熟期可能出现极旱几率明显高于生长初期,一般在40%以上;从地区分布看,湘中、湘北重旱出现几率明显高于湘西和湘南。评估结果可为减轻晚稻干旱危害提供参考。
The late rice drought index is constructed from the aspect of crop moisture demands.The drought level index of late rice in Hunan is brought forward through analyzing contradistinctively the drought index and drought data of the typical year.The validation with the drought data of late rice in growing season shows that droughts can be reflected by the late rice drought index and drought level index. The results show：as for growing seasons,the probabilityes of extreme drought in the fast growing,mid-growing,and maturity stages are greater than that in the prime growing season obviously,generally greater than 40%; as for regions,the probabilities of severe drought in the middle and northern parts of Hunan are greater than those in the western and southern parts.This model can be used to analyze the drought situation of late rice in different parts of Hunan Province at different times,providing useful references for drought resisting of late rice.
出处
《气象科技》
北大核心
2010年第1期120-124,共5页
Meteorological Science and Technology
基金
国家科技支撑计划重点项目"南方季节性干旱防控技术研究"(006BAD04B07-2)
中国气象局新技术推广项目"水稻气象灾害精细化风险区划技术研究"(CMATG2008M45)资助
关键词
晚稻
干旱
评估模型
later-rice
drought
assessment model
