淹水对大豆生长的影响

研究了两种不同的淹水方式－苗全被淹没（全淹）和基部淹没（半淹）对大豆苗生长的影响，在全淹下，苗完全停止生长，直至死亡。但是，只要露出顶芽在空气中，苗就不被淹死。大豆苗的耐涝性随苗龄增大而提高。半淹处理明显抑制苗根的生长和降低苗的根冠比，却大大刺不定根的生长。试验结果还显示，大豆能在长时期半淹条件下生长发育，但其营养器官和结实器官的发育无显著差于对照。淹水对根瘤的生长有抑制作用。

EFFECT OF FLOODING ON GROWTH OF SOYBEAN SEEDLINGS

Growth responses of soybean seedlings to whole plant flooding and stem basal flooding were studied. The growth of soybean seedlings entirely ceased under whole plant flooding conditions. Howerer, the seedlings could continue to grow and were not drowned as long as terminal buds of soybean seedling exposed to the air. Survivability of seedlings under whole plant flooding conditions increased with aging of seedlings. Treatment of soybean seedlings with basal flooding severely inhibited primary root growth of seedlings, decreased the root shoot ratio and greatly stimulated the growth of adventitius roots. The experimental results shown that soybean plants could grow and develop under basal flooding condition throughout their life, but development of their vegetative and reproductive organ remarkably reduced as compared to control plants. The nodule growth of soybean plant roots was inhibited by flooding.