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本文研究了水稻旱育秧播量大小和秧龄长短对秧苗素质及生长发育的影响。结果表明：密播的秧苗从3叶期起，叶片维管束数少于稀播的，随播量增大，秧龄增长，差异随之加大，同时水稻穗型也随之变小。在高密度下，3叶以后秧苗出叶开始速度减慢，同时还随着秧龄的增长，总叶龄增加，营养生长延长。
In this paper, the effects of seedling size and seedling growth on seedling quality and seedling age were studied. The results showed that from the third leaf stage, the number of vascular bundles in leaves was less than that in sparse sowing. With the increase of seeding rate, the seedling age increased and the difference increased. At the same time, the panicle size of rice decreased. Under the high density, the seedling leaves began to slow down after 3 leaves, meanwhile with the growth of seedling age, the total leaf age increased and the vegetative growth prolonged.