在华主席、党中央、国务院高度重视下培育成功的杂交水稻是我国水稻生产上一项重大改革,对农业生产正在发生深远的影响。我省连作晚稻中可以利用杂交稻,其中南优2号是现有的较好杂交种。但是,它的生育期较长,不耐迟播迟栽,初步试验认为在杭嘉湖地区要求6月15日播种,7月25日以前栽入大田。然而,7月25日以前早稻已收获的面积很少,而且还要作两段育秧的寄秧田等用途。因而,迟栽到底影响多大?能不用两段育秧法促进南优2号在迟栽条件下增产,促进杂交稻更好地推广扩大?就是本试验探索的主要目的。 Under President Hua, the Central Party Committee and the State Council attach great importance to cultivating successful hybrid rice, which is a major reform in China’s rice production, is having a profound and far-reaching impact on agricultural production. Hybrid rice can be used in continuous cropping of late rice in our province, among which Nanyou No.2 is the better hybrid. However, it has a longer period of growth and impatiences late seeding, the preliminary test that in the Hangjiahu region requires June 15 planting, July 25 before planting into the field. However, the area where early rice had been harvested before July 25 was very small and there were two uses of seedling for nursery. Therefore, late in the end affect how much? Can not use two methods of raising seedlings to promote Namur 2 yield increase in late planting conditions, to promote hybrid rice to better promote the expansion is the main purpose of this test to explore.