杂交中籼稻生殖期间气象要素与结实率的相关性分析

Correlation Relationship between Seed-setting Rates and Meteorological Elements during Grain Reproduction Stage of Hybrid Midseason-rice

以1992～2004年湖北省中稻区域试验及武汉、荆州、襄樊气象站的资料为依据,分析杂交中籼稻生殖期间各种气象要素与年度间结实率变化的相关性。结果表明:各种气象要素与水稻年度间结实率变化存在不同程度的相关性,其相关程度依次为7～9月累计日照时数、7～8月日平均地温和7～9月日平均昼夜温差;7～9月累计日照时数对水稻结实率的影响最大。

Correlation analysis of the annual seed-setting rates and meteorological elements in the reproductive period of hybrid midseason-rice was studied, basing on both trials in the medium rice regions of Hubei province from 1992 to 2004, and datas of climatological stations in Jingzhou, Wuhan and XiangFan cities.The results showed that correlations of various meteorological elements and seed-setting rates were different; the correlation between the total sunshine hours from July to September and the setting-rate was the most significant followed by the average soil temperature and day/night temperatvre regimes from July to September.