光照时间推算及在光温敏核不育水稻光敏感鉴定中的应用

Deduction and Calculation of Day-Length and It's Application to Photosensitive Identification on Photo-Thermo Sensitive Genic Male Sterile Rice

通过阐述太阳光照射时间长度几个概念的区别和联系,提出生物生理生态光敏感特性鉴定指标应为光照时间.再根据日地关系,推算出光照时间的计算方法,并按此方法计算出湖南5个和海南3个代表站每月15日的光照时间.分析比较不同气候及光照度条件下光照时间与可照时间之间的数据差异,说明可照时间在光温敏核不育水稻生态光敏感特性鉴定中的不足.最后还提出了一种有效估算不同光照度下人工模拟光照时间的试验方法,并探讨光照时间在光温敏核不育水稻光敏感特性鉴定中的应用.

This paper adduces that the index of biological physioecology photosensitive identification is daylength, by elaborating the distinction and the relation between some concepts related to the daylength, the duration of possible sunshine and the sunshine duration. The method of daylength deduced and computed is put forward according to the cardinal principle that the earth revolves both round the sun and on its own axis.The daylength data on monthly fifteenth in five main stations in Hunan and in three main stations in Hainan can be calculated with this method. It illustrates the insufficience of photothermo sensitive genic male sterile rice photosensitive identification in ecology by the duration of possible sunshine, by comparing the difference of data on daylength and the duration of possible sunshine in different synoptic climate. Finally,one experimental way of artificial simulation daylength is put forward for estimating validly daylength in different illuminances,and the application to photosensitive identification on photothermo sensitive genic male sterile rice is discussed.