【摘要】 以武育粳３号为材料，对平摆秧苗进行各种环境处理，观察立苗过程。用树脂切片法观察秧苗弯曲部位细胞结构。结果表明：①叶龄越小立苗速度越快；②苗质对立苗过程影响不大，但对发根和立苗后生长有显著影响；③光对立苗无影响；④在一定范围内（１２～３５℃）温度越高立苗越快，但持续高温（＞３５℃）则抑制立苗；⑤高湿高氧环境有利于立苗；⑥适宜的Ｃａ２＋浓度可促进立苗；⑦立苗主要是秧苗基部下侧具有伸长功能的细胞生长快于上侧所致。更多还原

【Abstract】 Various enviornmental treatments were carried out to the horizontal seedling. The cell structure of the curvature area was observed by emplying resin slicing approach. The results are as follows: ① The smaller is the leaf age, the shorter is the span of bending up. ② The bending up was not related to the quality of seedlings, but the growth of root and seedling was affected obviously by the quality of seedling. ③ Light has no effect on bending up process. ④ At certain range of temperature(12～35 ℃), higher temperature could stimulate bending up, but longer duration of high temperature (>35℃) could inhibit bendig up. ⑤ High humidity and suffient O 2 were benefical to the bending up process. ⑥ The horizontal seedlings could bend up well at appropriate concentration of Ca 2+ . ⑦ In the curvature zone of the horizontal seedling, actively elongating cells of the lower side grow faster than those of the upper side, which leads to an asymmetric growth.更多还原