Spatio-temporal variation of extreme precipitation during recent 50 years in Jiangsu Province and its influence on single-crop rice yield[J]. Guangdong Agricultural Sciences, 2017, 44(8): 139-144. DOI: 10.16768/j.issn.1004-874X.2017.08.022
    Citation: Spatio-temporal variation of extreme precipitation during recent 50 years in Jiangsu Province and its influence on single-crop rice yield[J]. Guangdong Agricultural Sciences, 2017, 44(8): 139-144. DOI: 10.16768/j.issn.1004-874X.2017.08.022

    Spatio-temporal variation of extreme precipitation during recent 50 years in Jiangsu Province and its influence on single-crop rice yield

    • Based on the data of daily precipitation and single-crop rice yield at 52 meteorological stations in Jiangsu during 1961–2012,the extreme precipitation indices (EPI) during growing periods from May to October were calculated,and the possible relationship between precipitation variability and rice yield was explored. The trend test for EPI in different stations indicated that the extreme precipitation during June,July,and August in most of stations had enhancing tendency,and the increasing trends of 1-day maximum precipitation amount in August was more obvious;however,the extreme precipitation during May,September,and October in most of stations had weakening tendency,and the decreasing trends of total rainy days in September was more obvious. The correlation analysis between the single-crop rice yield and EPI in different months indicated that there were negative correlations between yield and precipitation indices of July,August,September,and October. Among the different indices,the negative impacts of continued 7-day maximum precipitation amount in August and total rainy days in September were more obvious,and the single-crop rice in south Jiangsu was more sensitive to the variability of these two precipitation indicators.
    • loading

    Catalog

      Turn off MathJax
      Article Contents

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return