以三系杂交水稻德香4103和川作6优177为材料，在盆栽条件下，研究不同播种期对成都平原杂交中稻直播生长发育和产量的影响。结果表明，随着播种期的推迟，杂交中稻生育期缩短，主茎叶片数减少，出叶速度加快；在基本苗数相同的情况下，随着播种期的推迟，单株最高分蘖数和成穗率均降低，直播稻产量呈下降趋势。

The effects of sowing date on growth and yield of direct-seeding rice was researched through pot experiment by using three-line hybrid rice Dexiang 4013 and Chuanzuo 6 you 177 in Chengdu plain. The results indicated that along with the delayed sowing date, the whole growth period was shortened, the number of leaves on main stem reduced, leaf emergence speed was accelerated. Under the condition of the same basic seedling number, along with the delayed sowing date, the maximum tiller number per plant, the earbering tiller percentage and the yield were decreased.