江苏省单季稻生育期内连续降水事件的时空变化  

Spatio-temporal Variation of Consecutive Rainfall Events in Growth Period of Single-cropping Rice in Jiangsu Province

作　　者：徐阳[1] 孙莉娟 黄进[3] 伍琼[1] 朱雅丽[1] XU Yang;SUN Li-juan;HUANG Jin;WU Qiong;ZHU Ya-li(Rural Comprehensive Economic Information Center of Anhui Province / Anhui Engineering Laboratory of Agroecological Big Data, Hefei 230031, China;Anhui Weather Modification Office, Hefei 230031, China;School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China)

机构地区：[1]安徽省农村综合经济信息中心/安徽省农业生态大数据工程实验室,安徽合肥230031 [2]安徽省人工影响天气办公室,安徽合肥230031 [3]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《江西农业学报》2018年第5期89-93,共5页Acta Agriculturae Jiangxi

基　　金：公益性行业科研专项(GYHY201506018);江苏省高校自然科学研究面上项目(16KJB170008);安徽省科技攻关项目(1501031078)

摘　　要：利用江苏省52个气象站1961~2012年逐日降水资料及单季稻产量逐年数据,计算了生育期(5~10月)的连续降水指数,探讨了连续降水事件的时空变化及与产量的潜在联系。结果表明:(1)该省单季稻生育期内连续降水事件呈现出一定的降水集中性,雨天和雨量均主要分布在持续2 d的降水事件。与苏北地区相比,苏南地区的中长期历时连续降水事件发生的频次明显较高。(2)近52年来单季稻生育期内长历时连续降水事件的减弱,而中短历时连续降水事件则有所增强,其中苏南地区历时5 d连续降水事件的减弱趋势尤为显著。(3)中长期历时连续降水事件对江苏省大部的单季稻产量有着不利的影响,特别是历时6 d以上连续降水事件的总雨量(P6d)对产量的负效应最为显著,而苏西南和苏中北部地区的产量对这一指标的波动更为敏感。Based on the data of daily rainfall and yearly single-cropping rice yield at 52 meteorological stations in Jiangsu during 1961 ～ 2012,we calculated the consecutive rainfall indexes in rice growth period（from May to October）,and explored the spatio-temporal variations of consecutive rainfall events and their potential relation with rice yield.The results showed that：（1）The consecutive rainfall events in growth period of single-cropping rice in Jiangsu exhibited a certain concentrated rainfall,and the rainy day and precipitation amount were mainly distributed in the rainfall events lasting for 2 d.Compared to northern Jiangsu,the frequency of consecutive rainfall events with middle or long duration in southern Jiangsu was obviously relatively high.（2） In recent 52 years,the consecutive rainfall events with long duration weakened,while those with short or middle duration strengthened to some extent,and the weakening trend of the consecutive rainfall events lasting for 5 d in southern Jiangsu was specially significant.（3） The consecutive rainfall events with middle or long duration had negative impacts on the yield of single-cropping rice in most areas of Jiangsu,especially the total precipitation amount（P6 d） of the rainfall events lasting for over 6 d had the most significantly negative impacts,and the yield of single-cropping rice in southwestern,central and northern Jiangsu was more sensitive to P6 d.

关 键 词：江苏 单季稻 连续降水指数 

分 类 号：S166[农业科学—农业气象学] P426.6[农业科学—农业基础科学]