以水育秧为对照 ,研究旱育秧干物质积累、分配和运转 ,源库关系以及对产量的影响。结果表明 :旱育秧高产的主要原因是在相同栽培条件下其单位面积的穗数较多 ;旱育秧高产的生理基础是其光合势大 ,干物质积累多 ,且在较高叶面积系数的前提下 ,粒叶比较高。但在本试验条件下旱育秧的干物质表观转变率低 ,导致其经济系数低 ,限制了其产量潜力的发挥 Taking watering and planting seedlings as control, the effects of dry matter accumulation, distribution and operation, source-sink relationship and yield on dry-raising seedlings were studied. The results showed that the main reason for the high yield of dry nursery seedling was that there were more spikes per unit area under the same cultivation conditions. The physiological basis of high yielding nursery seedlings was the prerequisite of photosynthetic potential, dry matter accumulation, and higher leaf area coefficient Under the grain leaves is relatively high. However, under the experimental conditions, the apparent transformation rate of dry matter of dry nursery seedlings is low, which leads to its low economic coefficient and restricts the development of its yield potential