本研究着重探讨了旱育稀植栽培技术中，早插壮秧这一基干措施。设置了从５月１５日至６月４日每隔５ｄ插秧的５种不同插秧期的处理。试验结果表明，北方寒冷稻作区，过早插秧虽然千粒重和稳粒数增多，但由于低温寒潮对于移栽伤影响严重，造成决定穗数的低节位分蘖过少，不易获得高产。插秧过晚，气温高，缓苗快，低节位分蘖多，单位面积有效穗数增加，但营养生长期延迟，千粒重和穗粒数明显降低，不易争取稳产。所以早播壮秧应该是避开低温寒潮的适时早插。 This study focuses on the cultivation of dry nursery sparse planting techniques, early inserted strong seedlings of this basic measure. Five different seedling planting periods were set up every 5 days from May 15 to June 4. The results showed that in the northern cold paddy planting area, premature transplanting increased grain weight and grain number, however, low temperature cold wave had a serious impact on transplanting injury, resulting in too few tillers with low spike number, which made it difficult to obtain high yield. Transplanting too late, the temperature is high, Huanmiao fast, low-node tillers and more, the effective panicle per unit area increased, but the delay of vegetative growth, grain weight and grain number decreased significantly, not easy to fight for stable yield. So early sowing seedlings should be to avoid the cold at a suitable time early insertion.