摘要
为农业救灾和水稻气象保险提供科学依据,利用逐日地面气象观测数据和贵州省34个县的水稻产量数据,构建喀斯特地貌下的水稻逐日干旱指数以及减产率模型,分析典型干旱年份水稻不同生育期累积干旱指数与减产率的关系。结果表明:贵州典型干旱年份水稻累积干旱指数与减产率关系模型均通过0.05的置信度检验;水稻抽穗扬花期,累积干旱指数在一5以下减产率达30%以上;水稻灌浆成熟期累积干旱指数在一10以下减产率达30%以上。利用不同生育期的累积干旱指数可以准确评估贵州各地水稻的干旱损失。
This purpose of the article was to provide scientific basis for agricultural disaster relief and rice meteorological insurance.Based on the daily meteorological observation data and the rice yield data of 34 counties of Guizhou,the rice daily drought index and the yield reduction rate model under karst landform were constructed to analyze the relationship between the rice cumulative drought index in different growth periods and yield reduction rate.The results showed that the relationship between the cumulative drought index of rice and the yield reduction rate in typical drought year passed the significance test.During the flowering and heading stage of rice,the cumulative drought index was less than一5,and the yield reduction rate could reach more than 30%.The cumulative drought index during the ripening stage of rice was below—10,and the yield reduction rate could reach more than 30%.Therefore,the drought loss of rice in Guizhou could be accurately assessed by using drought accumulation indexes at different growth periods.
作者
胡家敏
古书鸿
张波
赵娟
HU Jiamin;GU Shuhong;ZHANG Bo;ZHAO Juan(Guizhou Institute of Mountainous Environment and Climate,Guiyang,Guizhou 550002;Key Laboratory of Mountainous Climate and Resources of Guizhou Province,Guiyang,Guizhou 550002;Tongzi Meteorological Bureau of Guizhou Province,Tongzi,Guizhou 563000,China)
出处
《贵州农业科学》
CAS
2019年第5期138-141,共4页
Guizhou Agricultural Sciences
基金
贵州省农业科技攻关项目“贵州农事气象服务平台研究”[黔科合NY字(2011)3091]
兰州干旱气象科学研究基金项目“贵州省水稻干旱风险评估与区划”(IAM201406)
关键词
水稻
干旱指数
干旱评估
贵州
rice
drought index
drought assessment
Guizhou