１９８９年，作者研究了籼型两用不育系安农Ｓ—１的生态适应特性。结果表明：安农Ｓ—１的播种至始穗历期及主茎总叶片数随纬度的增高而增加，随栽培季节温度的升高而减少。温度是安农Ｓ—１育性转换的主导因素，其连续全不育期随纬度的升高而缩短。 In 1989, the author studied the ecological adaptability of Annong S-1, an indica dual-use sterile line. The results showed that: Annong S-1 sowing to the beginning of the ear period and the main stem of the total leaf number increased with increasing latitude, with the training season temperature decreased. Temperature is the dominant factor in the fertility conversion of Annong S-1, and its continuous all-sterile period shortens with the increase of latitude.